Combustion chamber and parameter determination method, device and equipment of sound absorption structure in combustion chamber

Abstract

The present disclosure provides a combustion chamber and a method, device and equipment for determining parameters of an acoustic absorption structure in the combustion chamber, and relates to the technical field of aero-engines. The combustion chamber comprises a flame tube composed of a heat source mounting surface arranged in a radial direction, and a side wall surface arranged in an axial direction on a first side of the heat source mounting surface; and an acoustic absorption structure arranged on at least one of the heat source mounting surface and the side wall surface. The present disclosure can effectively suppress low-frequency mode combustion instability in the combustion chamber.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of aero-engine, and particularly relates to a combustion chamber, and a method, device and equipment for determining parameters of a sound absorption structure in the combustion chamber. BACKGROUND

[0002] The combustion chamber is a core component of a modern propulsion system, and its performance has a key influence on the overall characteristics of the system. In the combustion chamber of an aero-propulsion system, when the phase of the unsteady heat release and the sound wave generated by combustion is the same, combustion instability occurs, which is characterized by obvious noise, and in severe cases, the mechanical structure is damaged, and even the propulsion system loses thrust performance.

[0003] In order to suppress combustion instability, a passive control method that is not affected by the heat source is usually used. The idea of the passive control method is to increase the boundary sound absorption capacity to suppress combustion oscillation. The classical Helmholtz resonator or the traditional side wall sound lining structure is used as the main traditional passive control device, which has good suppression effect on most high-frequency mode combustion instability in the combustion chamber in actual application.

[0004] However, the aero-engine has the characteristics of small volume and compact structure. If the traditional passive control method is used to suppress low-frequency mode combustion instability, such as the classical Helmholtz resonator and the side wall sound lining, a larger geometric structure size is required to have a good sound absorption effect on the low-frequency mode, which means that the traditional passive control device cannot be applied in the combustion chamber with compact structure. Therefore, it is necessary to develop a new sound absorption device to effectively suppress the low-frequency mode combustion instability in the combustion chamber of the aero-propulsion system. SUMMARY

[0005] The present disclosure provides a combustion chamber and a method, device and equipment for determining parameters of a sound absorption structure in the combustion chamber to effectively suppress low-frequency mode combustion instability in the combustion chamber. The technical solutions of the present disclosure are as follows:

[0006] According to a first aspect of the present disclosure, a combustion chamber is provided, which comprises:

[0007] a flame tube composed of a heat source mounting surface arranged in a radial direction, and a side wall surface arranged in an axial direction on a first side of the heat source mounting surface;

[0008] a sound absorption structure arranged on at least one of the heat source mounting surface and the side wall surface.

[0009] According to a second aspect of the present disclosure, a method for determining parameters of an acoustic absorption structure in a combustion chamber is provided, the method is used for determining setting parameters of an acoustic absorption structure arranged on a flame tube of a combustion chamber, the acoustic absorption structure is arranged on at least one of a heat source mounting surface arranged in a radial direction and a side wall surface arranged in an axial direction of the flame tube, and the method comprises:

[0010] constructing a first scattered sound field function describing a scattered sound field formed by an equivalent monopole source of the acoustic absorption structure in the flame tube, and constructing a second scattered sound field function describing a scattered sound field formed by an equivalent monopole source of the heat source in the flame tube;

[0011] processing the first scattered sound field function and the second scattered sound field function by Laplace transform to obtain a characteristic equation of coupling of the acoustic absorption structure and the heat source;

[0012] if a characteristic solution of the characteristic equation indicates that the current setting parameters of the acoustic absorption structure meet the low-frequency mode combustion instability suppression requirement, determining the current setting parameters of the acoustic absorption structure as target setting parameters of the acoustic absorption structure in the combustion chamber, wherein the setting parameters include setting position parameters and / or structure parameters of the acoustic absorption structure.

[0013] According to a third aspect of the present disclosure, a device for determining parameters of an acoustic absorption structure in a combustion chamber is provided, the method is used for determining setting parameters of an acoustic absorption structure arranged on a flame tube of a combustion chamber, the acoustic absorption structure is arranged on at least one of a heat source mounting surface arranged in a radial direction and a side wall surface arranged in an axial direction of the flame tube, and the device comprises:

[0014] a construction module configured to construct a first scattered sound field function describing a scattered sound field formed by an equivalent monopole source of the acoustic absorption structure in the flame tube, and construct a second scattered sound field function describing a scattered sound field formed by an equivalent monopole source of the heat source in the flame tube;

[0015] a data processing module configured to process the first scattered sound field function and the second scattered sound field function by Laplace transform to obtain a characteristic equation of coupling of the acoustic absorption structure and the heat source;

[0016] a determination module configured to, if a characteristic solution of the characteristic equation indicates that the current setting parameters of the acoustic absorption structure meet the low-frequency mode combustion instability suppression requirement, determine the current setting parameters of the acoustic absorption structure as target setting parameters of the acoustic absorption structure in the combustion chamber, wherein the setting parameters include setting position parameters and / or structure parameters of the acoustic absorption structure.

[0017] According to a fourth aspect of the present disclosure, an electronic device is provided, comprising:

[0018] a processor; and

[0019] a memory storing a program,

[0020] wherein the program includes instructions that, when executed by the processor, cause the processor to perform the method of the second aspect.

[0021] According to a fifth aspect of the present disclosure, there is provided a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to cause the computer to perform the method of the second aspect.

[0022] The combustion chamber and the parameter determination method, device and equipment of the sound absorption structure in the combustion chamber provided in the embodiments of the present application can set the sound absorption structure on at least one of the heat source mounting surface arranged radially along the flame tube and the side wall surface arranged axially on the first side of the heat source mounting surface, so that the refractive index of the sound wave is negative, so that the combustion chamber has stronger sound absorption capacity, so as to control the low-frequency combustion instability in the combustion chamber. At the same time, the sound absorption structure arranged on the side wall surface of the flame tube in the axial direction or the radial direction can make the low-frequency combustion instability in the combustion chamber not limited by the structure of the combustion chamber, so as to achieve the goal of suppressing the low-frequency combustion instability in the combustion chamber with limited geometry, and reduce the difficulty of suppressing the low-frequency combustion instability in the combustion chamber with limited geometry. BRIEF DESCRIPTION OF DRAWINGS

[0023] In the following description of the exemplary embodiments in conjunction with the drawings, more details, features and advantages of the present disclosure are disclosed, in which:

[0024] Figure 1 A cross-sectional structure schematic diagram of a combustion chamber of an exemplary embodiment of the present disclosure is shown;

[0025] Figure 2 A structure schematic diagram of an annular combustion chamber of an exemplary embodiment of the present disclosure is shown;

[0026] Figure 3 A cross-sectional structure schematic diagram of another annular combustion chamber of an exemplary embodiment of the present disclosure is shown;

[0027] Figure 4 A cross-sectional structure schematic diagram of still another annular combustion chamber of an exemplary embodiment of the present disclosure is shown;

[0028] Figure 5 A cross-sectional structure schematic diagram of a combustion chamber of an exemplary embodiment of the present disclosure is shown;

[0029] Figure 6 A flow chart of a parameter determination method of a sound absorption structure in a combustion chamber of an exemplary embodiment of the present disclosure is shown;

[0030] Figure 7 FIG. 7 shows a schematic block diagram of a parameter determination apparatus of an acoustic absorption structure in a combustion chamber according to an example embodiment of the present disclosure;

[0031] Figure 8 FIG. 8 shows a schematic block diagram of a chip according to an example embodiment of the present disclosure;

[0032] Figure 9 FIG. 9 shows a structural block diagram of an example electronic device that can be used to implement an embodiment of the present disclosure. DETAILED DESCRIPTION

[0033] Embodiments of the present disclosure will be described in more detail with reference to the drawings. While certain embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be embodied in various forms and should not be interpreted as being limited to the embodiments set forth herein; rather, these embodiments are provided so that the present disclosure can be more thoroughly and completely understood. It should be understood that the drawings of the present disclosure are only for illustrative purposes and should not be used to limit the scope of protection of the present disclosure.

[0034] It should be understood that each step recited in the method embodiments of the present disclosure can be executed in different orders and / or in parallel. In addition, the method embodiments can include additional steps and / or omit the execution of the steps shown. The scope of the present disclosure is not limited in this respect.

[0035] The term “comprising” and variations thereof as used herein are used inclusively, i.e., “comprising, but not limited to.” The term “based on” is “based, at least in part, on.” The term “one embodiment” means “at least one embodiment”; the term “another embodiment” means “at least one additional embodiment”; the term “some embodiments” means “at least some embodiments.” Related terms are defined in the description that follows. It should be noted that the concepts mentioned in the present disclosure are merely used to distinguish different apparatuses, modules or units, and are not used to limit the order or interdependence of the functions performed by these apparatuses, modules or units.

[0036] It should be noted that the modification of “one” or “more” mentioned in the present disclosure is illustrative rather than limiting, and those skilled in the art should understand that, unless otherwise explicitly indicated in the context, it should be understood as “one or more”.

[0037] The names of the messages or information exchanged between the plurality of apparatuses in the embodiments of the present disclosure are only used for illustrative purposes, and are not used to limit the scope of the messages or information.

[0038] To address the problem of combustion instability, traditional passive control methods, such as Helmholtz resonators or nonlocal acoustic liner structures consisting of perforated plates and back cavities that simultaneously function as cooling walls, can typically provide good suppression of high-frequency modal combustion instability.

[0039] However, if passive control schemes such as Helmholtz resonators or traditional sidewall acoustic liners are used to suppress low-frequency combustion instability modes, the classical Helmholtz resonator and the back cavity of the traditional sidewall acoustic liner need to be on the order of meters to achieve effective sound absorption control of low-frequency modes. This is obviously difficult to achieve in modern aero engines with more compact geometry (for example, the back cavity thickness of the acoustic liner is about 8 cm). Therefore, traditional passive control methods are difficult to suppress low-frequency mode combustion instability in combustion chambers with restricted geometry.

[0040] To address the aforementioned problems, embodiments of this disclosure provide a combustion chamber, wherein, as... Figure 1 As shown, Figure 1 A cross-sectional structural schematic diagram of a combustion chamber provided in an embodiment of this disclosure is shown, including:

[0041] The flame tube is composed of a heat source mounting surface 1011 arranged radially and a side wall surface 1012 arranged axially on a first side of the heat source mounting surface.

[0042] A sound-absorbing structure 102 is disposed on at least one of the heat source mounting surface 1011 and the side wall surface 1012. Specifically, the location of the sound-absorbing structure can be determined based on actual needs; this embodiment does not limit this. For example... Figure 1 The diagram shows an annular combustion chamber with a sound-absorbing structure 102 installed on the heat source mounting surface 1011 of the flame tube.

[0043] In summary, the combustion chamber provided in this embodiment can exhibit stronger sound absorption capability by setting sound-absorbing structures on at least one of the heat source mounting surface arranged radially along the flame tube and the side wall surface arranged axially along the first side of the heat source mounting surface, so that the refractive index of the sound wave is negative, thereby controlling the low-frequency combustion instability in the combustion chamber. At the same time, by setting sound-absorbing structures on the side wall surface of the flame tube along the axial or radial direction, the suppression of low-frequency combustion instability in the combustion chamber is not limited by the combustion chamber structure, thus achieving the goal of suppressing low-frequency combustion instability in a geometrically constrained combustion chamber and reducing the difficulty of suppressing low-frequency combustion instability in a geometrically constrained combustion chamber.

[0044] In one optional embodiment, the combustion chamber is an annular combustion chamber. Figure 2A structural schematic diagram of a ring-shaped combustor is shown, as shown in Figure 2 The ring-shaped combustor further comprises:

[0045] The shell comprises an outer shell wall surface 1031 and an inner shell wall surface 1032 arranged in an axial direction, and the flame tube is arranged between the outer shell wall surface 1031 and the inner shell wall surface 1032, wherein the side wall surface of the flame tube arranged in the axial direction comprises an outer side wall surface 1012a and an inner side wall surface 1012b, and the sound absorption structure is arranged on at least one of the outer side wall surface, the inner side wall surface and the heat source mounting surface, wherein, Figure 2 A structural schematic diagram of a ring-shaped combustor provided with a sound absorption structure 102 on the outer side wall surface 1012a of the flame tube is shown; the refractive index of the sound wave can be negative by arranging the sound absorption structure on the wall surface of the flame tube of the ring-shaped combustor, so that the ring-shaped combustor has stronger sound absorption capacity, thereby controlling the low-frequency combustion instability in the ring-shaped combustor.

[0046] It should be noted that, as shown in Figure 2 The ring-shaped combustor further comprises a swirler heat source channel 104 arranged radially on the outer shell wall surface 1031 of the shell and the outer side wall surface 1012a of the flame tube, for guiding the heat source provided by the swirler into the flame tube; wherein the shell and the flame tube are a back cavity, for providing constant temperature cooling gas for the ring-shaped combustor. It can be understood that, in the ring-shaped combustor, the heat source mounting surface is the intersection surface of the swirler heat source channel and the flame tube.

[0047] Optionally, as shown in Figure 2 The outer side wall surface 1012a and the inner side wall surface 1012b of the flame tube can further comprise a perforated plate 105 arranged in an axial direction, for further suppressing noise.

[0048] Figure 3 A structural schematic diagram of another ring-shaped combustor is shown, as shown in Figure 3 The ring-shaped combustor further comprises: Figure 3 A structural schematic diagram of a ring-shaped combustor provided with a sound absorption structure 102 on the inner side wall surface 1012b of the flame tube is shown; as shown in Figure 3 The ring-shaped combustor further comprises: Figure 4 A structural schematic diagram of a ring-shaped combustor provided with a sound absorption structure 102 on the heat source mounting surface 1011 and the inner side wall surface 1012b of the flame tube is shown.

[0049] It should be noted that, in the present disclosure, the more sound absorption structures arranged in the combustor, the better the suppression effect on low-frequency combustion instability, and the specific number can be determined based on actual needs, which is not limited in the present disclosure.

[0050] In an optional embodiment, the combustion chamber is a afterburner, Figure 5 Fig. 1 shows a schematic diagram of a partial interface of an afterburner according to an embodiment of the present disclosure, wherein the heat source mounting surface is a flame stabilizer, and Fig. 2 shows a schematic diagram of a structure of the afterburner according to an embodiment of the present disclosure, wherein the heat source mounting surface is a flame stabilizer. Figure 5 As shown in the figures, the afterburner further comprises: a diffuser 106 arranged axially on a second side of the flame stabilizer 108;

[0051] An igniter 107 is arranged on the flame stabilizer 108, wherein the sound absorption structure 102 is arranged on at least one of the flame stabilizer 108 and the side wall surface 1012; wherein, Figure 5 As shown in the figures, the afterburner further comprises: a diffuser 106 arranged axially on a second side of the flame stabilizer 108;

[0052] In an optional embodiment, the sound absorption structure can be an acoustic metamaterial or an acoustic metasurface, and the sound absorption capability of the acoustic metamaterial or the acoustic metasurface can be applied to the combustion chamber to suppress low-frequency instability in the combustion chamber and reduce the difficulty of suppressing low-frequency modal combustion instability in a geometrically restricted combustion chamber.

[0053] In an optional embodiment, the sound absorption structure can be composed of parallel Helmholtz resonators. The parallel optimization of Helmholtz resonators can be used to suppress low-frequency instability in the combustion chamber and reduce the difficulty of suppressing low-frequency modal combustion instability in a geometrically restricted combustion chamber.

[0054] The present disclosure provides a method for determining parameters of a sound absorption structure in a combustion chamber, which is used to determine the setting parameters of a sound absorption structure arranged on a flame tube of a combustion chamber, the sound absorption structure being arranged on at least one of a heat source mounting surface arranged radially and a side wall surface arranged axially of the flame tube, and the method can be applied to an electronic device with data processing capability, which can be a terminal device or a server, wherein the terminal device can be a computer, a notebook, a tablet computer, or the like. Figure 6 As shown in the figures, the method comprises:

[0055] Step S601: constructing a first scattered sound field function formed by an equivalent monopole source of the sound absorption structure in the flame tube, and constructing a second scattered sound field function formed by an equivalent monopole source of the heat source in the flame tube;

[0056] Step S602, the first scattered sound field function and the second scattered sound field function are processed by Laplace transform to obtain a characteristic equation of the coupling effect of the sound absorption structure and the heat source;

[0057] Step S603, if the characteristic solution of the characteristic equation indicates that the current setting parameter of the sound absorption structure meets the low-frequency mode combustion instability suppression requirement, the current setting parameter of the sound absorption structure is determined as the target setting parameter of the sound absorption structure in the combustion chamber.

[0058] The setting parameter includes a setting position parameter and / or a structure parameter of the sound absorption structure.

[0059] In summary, the parameter determination method of the sound absorption structure in the combustion chamber provided by the embodiments of the present disclosure can consider the coupling effect of the sound absorption structure and the heat source, establish a combustion instability model of the coupling effect of the sound absorption structure and the heat source, and update the setting parameter of the sound absorption structure by comparing the solving results of the characteristic equation of the combustion instability model of the coupling effect of the sound absorption structure and the heat source and the low-frequency mode combustion instability suppression condition, so as to determine the setting parameter of the sound absorption structure that can more effectively suppress the low-frequency mode combustion instability in the annular combustion chamber, so as to improve the effectiveness and reliability of the combustion chamber containing the sound absorption structure in suppressing the low-frequency mode combustion instability in the actual operation process.

[0060] Step S601, a first scattered sound field function describing an equivalent monopole source of the sound absorption structure formed in the flame tube is constructed, and a second scattered sound field function describing an equivalent monopole source of the heat source formed in the flame tube is constructed.

[0061] In an optional embodiment, since the sound absorption structure forms an acoustic impedance boundary condition at this spatial position, the influence on the sound field is consistent with the response characteristics of the pulsating spherical source, i.e., the monopole source, then according to the generalized function theory, the first scattered sound field function describing the equivalent monopole source of the sound absorption structure formed in the flame tube is constructed as follows:

[0062]

[0063] In formula 1, represents the pressure disturbance of the equivalent monopole source of the sound absorption structure formed in the flame tube, represents the position information of the observation point in the three-dimensional space of the equivalent monopole source of the sound absorption structure, r, θ, x respectively represent the radial coordinate, the circumferential coordinate and the axial coordinate in the cylindrical coordinate system, t represents the time of the observation point, N represents the number of the equivalent monopole sources of the sound absorption structure, j represents the serial number of the equivalent monopole source of the sound absorption structure, and S represents the area of the equivalent monopole source of the sound absorption structure, represents the gas density in the flame tube, represents normal acoustic particle velocity of equivalent monopole source describing surface of sound absorption structure, represents source point coordinate of equivalent monopole source, represents source point time of equivalent monopole source, and G represents Green function; it can be understood that in the embodiments of the present disclosure, represents source point coordinate of equivalent monopole source describing sound absorption structure in three-dimensional space, represents source point time of equivalent monopole source describing sound absorption structure.

[0064] Similarly, in an alternative embodiment, the influence of the heat source in the flame tube on the sound field in the flame tube can also be described by an equivalent monopole source, and then the second scattered sound field function formed by the equivalent monopole source describing the heat source in the flame tube in the flame tube is constructed as:

[0065]

[0066] In formula 2, represents scattered sound pressure formed by equivalent monopole source describing heat source in flame tube in flame tube, N f represents number of equivalent monopole sources describing heat source in flame tube, i represents serial number of equivalent monopole source describing heat source, ′ represents area of equivalent monopole source describing heat source, represents acoustic particle velocity of interface position between heat source outlet and inlet of flame tube, wherein, is obtained after flame unsteady heat release characteristics of heat source are described by a flame combustion function. It can be understood that in the embodiments of the present disclosure, represents source point coordinate of equivalent monopole source describing heat source in flame tube in three-dimensional space, represents source point time of equivalent monopole source describing heat source in flame tube.

[0067] It should be noted that in the embodiments of the present disclosure, the first scattered sound field function and the second scattered sound field function can be determined as a combustion instability model of coupling of the sound absorption structure and the heat source; the heat source and the sound absorption structure can be described by the equivalent monopole source, so as to realize the description of the characteristics of the heat source and the sound absorption structure by the equivalent monopole source, the influence of the coupling of the sound absorption structure and the heat source in the flame tube on the sound field in the flame tube is described, so as to construct a more accurate and reliable combustion instability model.

[0068] In an alternative embodiment, a third scattered sound field function formed by the interaction of the flame non-stationary heat release of the sound absorbing structure and the heat source in the flame tube can be determined based on a first scattered sound field function formed by an equivalent monopole source of the sound absorbing structure in the flame tube, and a second scattered sound field function formed by an equivalent monopole source of the heat source in the flame tube, wherein the third scattered sound field function is:

[0069]

[0070] In formula 3, represents the pressure disturbance formed in the flame tube by the coupling action between the equivalent monopole source of the heat source in the flame tube and the equivalent monopole source of the sound absorbing structure.

[0071] In step S602, the first scattered sound field function and the second scattered sound field function are processed by Laplace transform to obtain a characteristic equation of the coupling of the sound absorbing structure and the heat source.

[0072] In an alternative embodiment, the process of processing the first scattered sound field function and the second scattered sound field function by Laplace transform to obtain the characteristic equation of the coupling of the sound absorbing structure and the heat source can include: performing Laplace transform on the third scattered sound field function formed by the interaction of the flame non-stationary heat release of the sound absorbing structure and the heat source in the flame tube to obtain the characteristic equation of the coupling of the sound absorbing structure and the heat source, wherein the characteristic equation is:

[0073] X[ζ,ω]P=0; (Formula 4)

[0074] In formula 4, X represents the coefficient matrix of the characteristic equation, ζ represents the nonlinear limit cycle amplitude, ω represents the complex frequency of the thermoacoustic oscillation, and the vector P contains the complex pressure at each monopole source position in the flame tube.

[0075] In step S603, if the characteristic solution of the characteristic equation indicates that the current setting parameters of the sound absorbing structure meet the low-frequency mode combustion instability suppression requirement, the current setting parameters of the sound absorbing structure are determined as the target setting parameters of the sound absorbing structure in the combustion chamber.

[0076] In the embodiments of the present disclosure, the setting parameters include a setting position parameter and / or a structure parameter of the sound absorption structure, wherein the setting position parameter can include a setting position parameter of the sound absorption structure on a heat source mounting surface of the flame tube, and / or on a sidewall surface axially arranged on a first side of the heat source mounting surface, and the structure parameter can include a shape, a size and / or a combination manner of the sound absorption structure, and the like. In an example, in a case where the sound absorption structure is a parallel Helmholtz resonator, the structure parameter can include a number and a combination form of the Helmholtz resonator, and the like. The characteristic solution of the characteristic equation can include a real part of a complex frequency of the thermoacoustic oscillation, an imaginary part of the complex frequency of the thermoacoustic oscillation, and a nonlinear limit cycle amplitude. The real part of the complex frequency of the thermoacoustic oscillation is a frequency of the thermoacoustic oscillation.

[0077] In an optional embodiment, the process of determining whether the characteristic solution of the characteristic equation indicates that the current setting parameter of the sound absorption structure meets the low-frequency mode combustion instability suppression requirement can include: if the frequency of the thermoacoustic oscillation belongs to a preset low-frequency interval and the imaginary part is greater than 0, it is determined that the characteristic solution of the characteristic equation indicates that the current setting parameter of the sound absorption structure meets the low-frequency mode combustion instability suppression requirement; or if the frequency of the thermoacoustic oscillation belongs to the preset low-frequency interval and the nonlinear limit cycle amplitude is less than a preset parameter value, it is determined that the characteristic solution of the characteristic equation indicates that the current setting parameter of the sound absorption structure meets the low-frequency mode combustion instability suppression requirement. The preset low-frequency interval can be determined based on actual needs, and the present disclosure does not limit this. In an example, the preset low-frequency interval can be 20 Hz to 200 Hz. The preset parameter value is used to represent a mechanical stress that can be tolerated. The preset parameter value can be determined based on engineering practice, and the present disclosure does not limit this.

[0078] In an optional embodiment, if the characteristic solution of the characteristic equation indicates that the current setting parameter of the sound absorption structure does not meet the low-frequency mode combustion instability suppression requirement, an updated setting parameter of the sound absorption structure is determined in a parameter threshold interval of the sound absorption structure, and an updated characteristic equation of the coupling of the sound absorption structure and the heat source is obtained based on the updated setting parameter of the sound absorption structure. Further, the above process of determining the updated characteristic equation is repeated until the characteristic solution of the updated characteristic equation indicates that the updated setting parameter of the sound absorption structure meets the low-frequency mode combustion instability suppression requirement, and the updated setting parameter of the sound absorption structure is determined as a target setting parameter of the sound absorption structure in the combustion chamber. The parameter of the sound absorption structure that meets the low-frequency combustion instability suppression requirement can be determined by traversing the parameter threshold interval, so as to ensure the low-frequency combustion instability suppression effect of the flame tube provided with the sound absorption structure.

[0079] It can be understood that, in the embodiments of the present disclosure, the parameter threshold interval can include a setting position parameter threshold interval and / or a structure parameter interval, the setting position parameter threshold interval can be determined based on the actual size of the flame tube in the combustion chamber, and the structure parameter interval can be determined based on actual needs, which are not limited in the embodiments of the present disclosure.

[0080] The above mainly introduces the scheme provided by the embodiments of the present disclosure from the perspective of the electronic device. It can be understood that, in order to implement the above functions, the electronic device contains the hardware structure and / or software module corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of the examples described in the embodiments disclosed herein, the present disclosure can be realized in the form of hardware or a combination of hardware and computer software. Whether a certain function is implemented in hardware or computer software driven hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present disclosure.

[0081] The embodiments of the present disclosure can divide the functional units of the electronic device according to the above method examples, for example, each functional module can be divided corresponding to each function, or two or more functions can be integrated in one processing module. The above integrated module can be realized in the form of hardware or in the form of a software functional module. It should be noted that the division of the module in the embodiments of the present disclosure is illustrative, and is only a logical functional division. When actually implemented, there can be another division manner.

[0082] In the case of dividing each functional module corresponding to each function, the exemplary embodiments of the present disclosure provide a parameter determination device of a sound absorption structure in a combustion chamber, which can be an electronic device or a chip applied to an electronic device. Figure 7 A functional module schematic block diagram of the parameter determination device of the sound absorption structure in the combustion chamber according to the exemplary embodiments of the present disclosure is shown, which is used to determine the setting parameters of the sound absorption structure arranged along the axis on the outer wall surface and / or the inner wall surface of the combustion chamber. As shown in Figure 7 The parameter determination device of the sound absorption structure in the combustion chamber 700 includes:

[0083] The construction module 701 is configured to construct a first scattered sound field function describing a first scattered sound field formed by an equivalent monopole source of the sound absorption structure in the flame tube, and construct a second scattered sound field function describing a second scattered sound field formed by an equivalent monopole source of the heat source in the flame tube;

[0084] the data processing module 702 is configured to process the first scattered sound field function and the second scattered sound field function through a Laplace transform to obtain a characteristic equation of the coupling of the sound absorption structure and the heat source;

[0085] The determination module 703 is configured to determine the current setting parameter of the sound absorption structure as a target setting parameter of the sound absorption structure in the combustion chamber if the characteristic solution of the characteristic equation indicates that the current setting parameter of the sound absorption structure meets the low-frequency mode combustion instability suppression requirement, wherein the setting parameter includes a setting position parameter and / or a structure parameter of the sound absorption structure.

[0086] Optionally, the first scattered sound field function is:

[0087]

[0088] wherein, represents a pressure disturbance formed by an equivalent monopole source of the sound absorption structure in the flame tube, represents position information of an observation point in a three-dimensional space, r, θ, and x respectively represent a radial coordinate, a circumferential coordinate, and an axial coordinate in a cylindrical coordinate system, t represents a time of the observation point, N represents a number of the equivalent monopole sources of the sound absorption structure, j represents a serial number of the equivalent monopole source of the sound absorption structure, and S represents an area of the equivalent monopole source of the sound absorption structure, represents a gas density in the flame tube, represents a normal acoustic particle velocity of the equivalent monopole source of the sound absorption structure surface, represents a source point coordinate of the equivalent monopole source, represents a source point time of the equivalent monopole source, and G represents a Green function;

[0089] The second scattered sound field function is:

[0090]

[0091] wherein, represents a scattered sound pressure formed by an equivalent monopole source of the heat source in the flame tube in the flame tube, N f represents a number of the equivalent monopole sources of the heat source in the flame tube, i represents a serial number of the equivalent monopole source of the heat source, ′ represents an area of the equivalent monopole source of the heat source, represents an acoustic particle velocity of an interface position between a heat source outlet and an inlet of the flame tube.

[0092] Optionally, as shown in the first scattered sound field function and the second scattered sound field function, Figure 7 the device further includes an updating module 704 configured to:

[0093] If the characteristic solution of the characteristic equation indicates that the current setting parameters of the sound-absorbing structure do not meet the requirements for suppressing low-frequency modal combustion instability, then the updated setting parameters of the sound-absorbing structure are determined in the parameter threshold range of the sound-absorbing structure, and based on the updated setting parameters of the sound-absorbing structure, the updated characteristic equation of the coupling effect between the sound-absorbing structure and the heat source is obtained.

[0094] Repeat the above process of determining the updated characteristic equation until the characteristic solution of the updated characteristic equation indicates that the updated setting parameters of the sound-absorbing structure meet the requirements for suppressing low-frequency modal combustion instability. Then, determine the updated setting parameters of the sound-absorbing structure as the target setting parameters of the sound-absorbing structure in the combustion chamber.

[0095] Figure 8 A schematic block diagram of a chip according to an exemplary embodiment of the present disclosure is shown. Figure 8 As shown, the chip 800 includes one or more processors 801 and a communication interface 802. The communication interface 802 can support electronic devices in performing the data transmission and reception steps in the above-described method for determining the parameters of the sound-absorbing structure in the combustion chamber, and the processor 801 can support electronic devices in performing the data processing steps in the above-described method for determining the parameters of the sound-absorbing structure in the combustion chamber.

[0096] Optional, such as Figure 8 As shown, the chip 800 also includes a memory 803, which may include read-only memory and random access memory, and provides operation instructions and data to the processor. A portion of the memory may also include non-volatile random access memory (NVRAM).

[0097] In some implementations, such as Figure 8 As shown, processor 801 executes corresponding operations by calling operation instructions stored in memory (which may be stored in the operating system). Processor 801 controls the processing operations of any device in the electronic device; processor can also be called a central processing unit (CPU). Memory 803 may include read-only memory and random access memory, and provides instructions and data to processor 801. A portion of memory 803 may also include NVRAM. For example, in applications, memory, communication interfaces, and other components are coupled together via a bus system, which may include, in addition to a data bus, a power bus, a control bus, and a status signal bus, etc. However, for clarity, in... Figure 8 The general labeled all buses as Bus System 804.

[0098] The method disclosed in the embodiments of the present disclosure can be applied to a processor or implemented by the processor. The processor can be an integrated circuit chip having a signal processing capability. In the implementation process, the steps of the above method can be completed by the integrated logic electric circuit in the processor or the instruction form of the software. The processor can be a general processor, a digital signal processor (DSP), an ASIC, a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component. The disclosed methods, steps and logic block diagrams in the embodiments of the present disclosure can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in combination with the embodiments of the present disclosure can be directly embodied as a hardware code processor for execution, or a combination of hardware and software modules in the code processor for execution. The software module can be located in a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, or other mature storage medium in the art. The storage medium is located in the storage, and the processor reads the information in the storage, and combines the hardware to complete the steps of the above method.

[0099] The exemplary embodiments of the present disclosure further provide an electronic device, including: at least one processor; and a memory connected with the at least one processor in communication. The memory stores a computer program capable of being executed by the at least one processor, and the computer program, when executed by the at least one processor, is configured to cause the electronic device to perform the method according to the embodiments of the present disclosure.

[0100] The exemplary embodiments of the present disclosure further provide a non-transitory computer readable storage medium storing a computer program, and the computer program, when executed by a processor of a computer, is configured to cause the computer to perform the method according to the embodiments of the present disclosure.

[0101] The exemplary embodiments of the present disclosure further provide a computer program product, including a computer program, and the computer program, when executed by a processor of a computer, is configured to cause the computer to perform the method according to the embodiments of the present disclosure.

[0102] Reference Figure 9The following description serves as a structural block diagram of the electronic device 900 of this disclosure, which is an example of a hardware device applicable to various aspects of this disclosure. The electronic device is intended to represent various forms of digital electronic computer devices, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the disclosure described and / or claimed herein.

[0103] like Figure 9 As shown, the electronic device 900 includes a computing unit 901, which can perform various appropriate actions and processes according to a computer program stored in a read-only memory (ROM) 902 or a computer program loaded into a random access memory (RAM) 903 from a storage unit 908. The RAM 903 may also store various programs and data required for the operation of the electronic device 900. The computing unit 901, ROM 902, and RAM 903 are interconnected via a bus 904. An input / output (I / O) interface 905 is also connected to the bus 904.

[0104] Multiple components in electronic device 900 are connected to I / O interface 905, including: input unit 906, output unit 907, storage unit 908, and communication unit 909. Input unit 906 can be any type of device capable of inputting information to electronic device 900. Input unit 906 can receive input digital or character information and generate signal inputs related to user settings and / or function control of electronic device. Output unit 907 can be any type of device capable of presenting information and may include, but is not limited to, a display, speaker, video / audio output terminal, vibrator, and / or printer. Storage unit 908 may include, but is not limited to, disk and optical disk. Communication unit 909 allows electronic device 900 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks, and may include, but is not limited to, modems, network cards, infrared communication devices, wireless communication transceivers, and / or chipsets, such as Bluetooth™ devices, WiFi devices, WiMax devices, cellular communication devices, and / or the like.

[0105] The computing unit 901 can be various general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the computing unit 901 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various specialized artificial intelligence (AI) computing chips, various computing units running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. The computing unit 901 performs various methods and processes described above. For example, in some embodiments, the methods of the present embodiments can be implemented as a computer software program tangibly embodied in a machine-readable medium, such as the storage unit 908. In some embodiments, portions or all of the computer program can be loaded and / or installed onto the electronic device 900 via the ROM 902 and / or the communication unit 909. In some embodiments, the computing unit 901 can be configured, by way of other any suitable means, such as by way of firmware, to perform the methods of the present embodiments.

[0106] Program code for carrying out methods of the present disclosure can be written in any combination of one or more programming languages. The program code can be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the program code, when executed by the processor or controller, produces a function / operation specified in the flowchart and / or block diagram. The program code can be executed entirely on a machine, partially on a machine, partially on a machine as a stand-alone software package, and partially on a remote machine or entirely on a remote machine or server.

[0107] In the context of the present disclosure, a machine-readable medium can be a tangible medium that can contain or store program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. Machine-readable storage media can include, without limitation, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of machine-readable storage media can include, but are not limited to, an electrical connection based on one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0108] As used in this disclosure, the terms "machine-readable medium" and "computer-readable medium" refer to any computer program product, apparatus and / or device (e.g., magnetic discs, optical disks, memory, Programmable Logic Devices (PLDs)) used to provide machine instructions and / or data to a programmable processor, including a machine-readable medium that receives machine instructions as a machine-readable signal. The term "machine-readable signal" refers to any signal used to provide machine instructions and / or data to a programmable processor.

[0109] To provide for interaction with a user, the systems and techniques described here can be implemented on a computer having a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the computer. Other kinds of devices can be used to provide for interaction with a user as well; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.

[0110] The systems and techniques described here can be implemented in a computing system that includes a back end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front end component (e.g., a client computer having a graphical user interface or a Web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back end, middleware, or front end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network (LAN), a wide area network (WAN), and the Internet.

[0111] The computing system can include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other.

[0112] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer programs or instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present disclosure are performed. The computer can be a general purpose computer, a special purpose computer, a computer network, a terminal, user equipment or other programmable apparatus. The computer programs or instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer programs or instructions can be transferred from one website site, computer, server or data center to another website site, computer, server or data center through wired or wireless manner. The computer readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center and the like integrated with one or more available media. The available media can be a magnetic medium, for example, a floppy disk, a hard disk, a magnetic tape; or an optical medium, for example, a digital video disc (digital video disc, DVD); or a semiconductor medium, for example, a solid state drive (solid state drive, SSD).

[0113] Although the present disclosure is described in conjunction with specific features and embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all alternatives, modifications and variations that fall within the scope of the present disclosure. Obviously, various modifications and changes are possible in the present disclosure without departing from the spirit and scope of the present disclosure. Accordingly, the present disclosure intends to include all such modifications and changes in the scope of the present disclosure. Obviously, those skilled in the art can make various modifications and changes to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and changes of the present disclosure fall within the scope of the claims of the present disclosure and their equivalent technologies, the present disclosure also intends to include these modifications and changes.

Claims

1. A method of determining parameters of an acoustic structure in a combustion chamber, characterized in that, The method is used for determining a setting parameter of a sound absorption structure arranged on a flame tube of a combustion chamber, the sound absorption structure is arranged on at least one of a heat source mounting surface arranged in a radial direction and a side wall surface arranged in an axial direction of the flame tube, and the method comprises: constructing a first scattered sound field function describing a first scattered sound field formed by an equivalent monopole source of the sound absorption structure in the flame tube, and constructing a second scattered sound field function describing a second scattered sound field formed by an equivalent monopole source of the heat source in the flame tube; processing the first scattered sound field function and the second scattered sound field function through a Laplace transform to obtain a characteristic equation of coupling of the sound absorption structure and the heat source; if a characteristic solution of the characteristic equation indicates that a current setting parameter of the sound absorption structure meets a low-frequency mode combustion instability suppression requirement, determining the current setting parameter of the sound absorption structure as a target setting parameter of the sound absorption structure in the combustion chamber, wherein the setting parameter comprises a setting position parameter and / or a structure parameter of the sound absorption structure; wherein the first scattered sound field function is: wherein, represents pressure disturbance formed by equivalent monopole sources describing the sound-absorbing structure in the flame tube, represents position information of an observation point in three-dimensional space observed by equivalent monopole sources describing the sound-absorbing structure, r, θ, x respectively represent radial coordinate, circumferential coordinate and axial coordinate in a cylindrical coordinate system, t represents time of the observation point, N represents number of equivalent monopole sources describing the sound-absorbing structure, j represents serial number of equivalent monopole sources describing the sound-absorbing structure, and S represents area of equivalent monopole sources describing the sound-absorbing structure, represents gas density in the flame tube, represents normal acoustic particle velocity of equivalent monopole sources describing the surface of the sound-absorbing structure, represents source point coordinate of the equivalent monopole source, represents source point time of the equivalent monopole source, and G represents Green function; the second scattered sound field function is: wherein, represents the scattered sound pressure formed inside the flame tube by the equivalent monopole sources representing the heat sources in the flame tube, N f represents the number of equivalent monopole sources representing the heat sources in the flame tube, i represents the serial number of the equivalent monopole sources representing the heat sources, S ′ represents the area of the equivalent monopole sources representing the heat sources, represents the acoustic particle velocity at the position of the interface between the heat source outlet and the inlet of the flame tube.

2. The method of determining parameters of a sound absorbing structure in a combustion chamber according to claim 1, characterized in that, the method further comprises: if the characteristic solution of the characteristic equation indicates that the current setting parameter of the sound absorption structure does not meet the low-frequency mode combustion instability suppression requirement, determining an updated setting parameter of the sound absorption structure in a parameter threshold interval of the sound absorption structure, and obtaining an updated characteristic equation of coupling of the sound absorption structure and the heat source based on the updated setting parameter of the sound absorption structure; repeating the process of determining the updated characteristic equation until a characteristic solution of the updated characteristic equation indicates that the updated setting parameter of the sound absorption structure meets the low-frequency mode combustion instability suppression requirement, and determining the updated setting parameter of the sound absorption structure as the target setting parameter of the sound absorption structure in the combustion chamber.

3. An apparatus for determining parameters of an acoustic structure in a combustion chamber, characterized by The device is used for determining a setting parameter of a sound absorption structure arranged on a flame tube of a combustion chamber, the sound absorption structure is arranged on at least one of a heat source mounting surface arranged in a radial direction and a side wall surface arranged in an axial direction of the flame tube, and the device comprises: a construction module configured to construct a first scattered sound field function describing a first scattered sound field formed by an equivalent monopole source of the sound absorption structure in the flame tube, and construct a second scattered sound field function describing a second scattered sound field formed by an equivalent monopole source of the heat source in the flame tube; a data processing module configured to process the first scattered sound field function and the second scattered sound field function through a Laplace transform to obtain a characteristic equation of coupling of the sound absorption structure and the heat source; a determination module configured to, if a characteristic solution of the characteristic equation indicates that a current setting parameter of the sound absorption structure meets a low-frequency mode combustion instability suppression requirement, determine the current setting parameter of the sound absorption structure as a target setting parameter of the sound absorption structure in the combustion chamber, wherein the setting parameter comprises a setting position parameter and / or a structure parameter of the sound absorption structure; wherein the first scattered sound field function is: wherein, represents pressure disturbance formed by equivalent monopole sources describing the sound absorption structure in the flame tube, represents position information of an observation point in three-dimensional space observed by equivalent monopole sources describing the sound absorption structure, r, θ, x respectively represent radial coordinate, circumferential coordinate and axial coordinate in a cylindrical coordinate system, t represents time of the observation point, N represents number of equivalent monopole sources describing the sound absorption structure, j represents serial number of equivalent monopole sources describing the sound absorption structure, and S represents area of equivalent monopole sources describing the sound absorption structure, represents gas density in the flame tube, represents normal acoustic particle velocity of equivalent monopole sources describing the surface of the sound absorption structure, represents source point coordinate of the equivalent monopole source, represents source point time of the equivalent monopole source, and G represents Green function. the second scattered sound field function is: wherein, represents the scattered sound pressure formed within the flame tube by an equivalent monopole source describing a heat source in the flame tube, N f represents the number of equivalent monopole sources describing a heat source in the flame tube, i represents the serial number of the equivalent monopole source describing the heat source, S ′ represents the area of the equivalent monopole source describing the heat source, represents the acoustic particle velocity at the location of the interface between the heat source outlet and the flame tube inlet.

4. An electronic device, comprising: comprising: a processor; and a memory storing a program, The program includes instructions that, when executed by the processor, cause the processor to perform the method of any of claims 1-2.

5. A non-transitory computer-readable storage medium having stored thereon computer instructions, wherein, The computer instructions are for causing the computer to perform the method of any of claims 1-2.

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