Calculation method, device, equipment and medium for collecting water droplets on rotor surface in forward flight

Abstract

The present application discloses a method, device, equipment and medium for calculating the water droplet collection on the surface of a rotor in a forward flight state, which relates to the field of aerospace technology, including: constructing a calculation grid for the current rotor, and determining the air flow field corresponding to the current rotor according to the calculation grid based on a plurality of preset azimuth angles; determining the water droplet flow fields corresponding to the current rotor at a plurality of said azimuth angles according to the air flow field; determining the water droplet information on the surface of the rotor at each said azimuth angle based on the water droplet flow field, and weighted averaging the water droplet information on the surface of the rotor at each said azimuth angle according to a preset weighting rule to obtain the water droplet collection situation on the surface of the rotor of the current rotor. By decomposing the forward flight periodic motion into flow field data at different azimuth angles, and then calculating and weighted averaging the water droplet motion for each flow field, it helps to overcome the contradiction between the relative position change of the blades in the forward flight state and the requirement that the object position remain unchanged for the water droplet collection calculation, and solves the problem of difficulty in predicting icing on the forward flight rotor.

Description

Technical Field

[0001] The present invention relates to the field of aerospace technology, and in particular to a method, device, equipment and medium for calculating water droplet collection on a rotor surface in a forward flight state. Background Art

[0002] Compared with fixed-wing aircraft, helicopters are widely used in search and rescue, material transportation, etc. due to their flexible flight control and low requirements for take-off and landing environments. With the improvement of helicopter functions and the expansion of their application areas, they face flight safety risks under more complex flight conditions, including rotor icing problems under cold and humid weather conditions. Rotor icing will directly increase the weight of the rotor and reduce the rotor thrust. At the same time, ice on the rotor surface may cause impact damage to the fuselage under the action of high-speed rotation and downwash. Therefore, conducting rotor icing research can predict the severity of icing conditions and evaluate the flight performance of helicopters after icing, which is of great significance to safe flight.

[0003] At present, the use of computational fluid dynamics to predict the icing situation on the rotor surface and conduct numerical simulation of rotor icing is one of the important means of icing research. The calculation of rotor icing mainly includes three processes: flow field calculation, water droplet transport and impact calculation, and surface icing calculation. Among them, water droplet transport and impact are the more critical intermediate processes. The output variable is the mass flow rate of water droplets collected on the rotor surface. Its accurate calculation is directly related to the scope and amount of icing. Due to the variable motion mode of the rotor, the flow field calculation is difficult. At present, the calculation of water droplet collection characteristics is mainly aimed at the relatively simple mode of hovering state. However, helicopters are mostly in the forward flight state, with blade pitch change, waving and other manipulations. This unsteady characteristic motion state is inconsistent with the requirement of relative stillness of the object for water droplet collection calculation. This leads to the typical unsteady characteristics of the flow field due to the blade pitch change, waving and other manipulations when the helicopter is flying forward, which is a big challenge for the water droplet collection calculation process involving the accumulation effect. Therefore, how to determine the water droplet condition on the rotor surface in the forward flight state of the helicopter is a problem to be solved in this field. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a method, device, equipment and medium for calculating water droplet collection on the surface of a rotor in forward flight, which decomposes the forward flight periodic motion into flow field data of different azimuth angles, and then calculates the water droplet motion for each flow field and performs weighted average, which helps to overcome the contradiction between the relative position change of the blade in the forward flight state and the requirement that the object position remains unchanged in the water droplet collection calculation, and solves the problem of difficult prediction of icing on the forward flight rotor. The specific scheme is as follows:

[0005] In a first aspect, the present application provides a method for calculating water droplet collection on a rotor surface in a forward flight state, comprising:

[0006] Constructing a computational grid of the current rotor, and determining an air flow field corresponding to the current rotor according to the computational grid based on a plurality of preset azimuth angles;

[0007] Determine the water droplet flow fields at the several azimuth angles corresponding to the current rotor according to the air flow field;

[0008] The water droplet information on the rotor surface at each azimuth angle is determined based on the water droplet flow field, and the water droplet information on the rotor surface at each azimuth angle is weighted averaged according to a preset weighting rule to obtain the water droplet collection status of the rotor surface of the current rotor.

[0009] Optionally, constructing a computational grid of the current rotor includes:

[0010] The rotor calculation shape of the current rotor is determined, and a calculation grid corresponding to the rotor calculation shape is generated using preset grid generation software; the calculation grid is an overlapping grid.

[0011] Optionally, determining the air flow field corresponding to the current rotor according to the calculation grid based on a plurality of preset azimuth angles includes:

[0012] Determining a first calculation method of the air flow field, a first boundary condition and parameter information of the current rotor;

[0013] The calculation grid is used as input data of a preset air flow field calculation program, so as to utilize the preset air flow field calculation program to determine the air flow field calculation result corresponding to the current rotor based on the calculation grid, the first calculation method, the first boundary condition and the parameter information.

[0014] Optionally, determining the air flow field corresponding to the current rotor includes:

[0015] The number of rotor blades of the current rotor is determined, and the air flow field calculation results corresponding to several azimuth angles are determined as the air flow field according to the number of rotor blades and a preset azimuth angle interval.

[0016] Optionally, determining the water droplet flow fields at the plurality of azimuth angles corresponding to the current rotor according to the air flow field includes:

[0017] Setting the wall suction boundary condition corresponding to the current rotor;

[0018] Determine a second calculation method and a second boundary condition of the water droplet flow field; the second boundary condition includes the wall suction boundary condition;

[0019] The air flow field is used as input data of a preset water droplet flow field calculation program, so as to utilize the preset water droplet flow field calculation program to determine the water droplet flow field calculation results of several azimuth angles corresponding to the current rotor based on the air flow field, the second calculation method and the second boundary condition as the water droplet flow field.

[0020] Optionally, the determining the water droplet information on the rotor surface at each azimuth angle based on the water droplet flow field includes:

[0021] Determine the water drop volume fraction and water drop velocity of each grid point in the calculation grid corresponding to the rotor blade of the current rotor;

[0022] The mass flow rate at each azimuth angle corresponding to the water droplet flow field is determined according to the water droplet volume fraction and the water droplet velocity, so as to use the mass flow rate as the water droplet information on the rotor surface.

[0023] Optionally, performing weighted averaging on the water droplet information on the rotor surface at each azimuth angle according to a preset weighting rule includes:

[0024] The mass flow is weighted averaged based on the number of rotor blades and the number of azimuth angles of the current rotor, so as to obtain the water droplet collection situation on the rotor surface according to the weighted average result.

[0025] In a second aspect, the present application provides a device for calculating water droplet collection on a rotor surface in a forward flight state, comprising:

[0026] An air flow field determination module, used to construct a calculation grid of the current rotor, and determine the air flow field corresponding to the current rotor according to the calculation grid based on a plurality of preset azimuth angles;

[0027] A water droplet flow field determination module, used to determine the water droplet flow fields at several azimuth angles corresponding to the current rotor according to the air flow field;

[0028] An information averaging module is used to determine the water droplet information on the rotor surface at each azimuth angle based on the water droplet flow field, and to perform weighted averaging on the water droplet information on the rotor surface at each azimuth angle according to a preset weighting rule to obtain the water droplet collection status of the rotor surface of the current rotor.

[0029] In a third aspect, the present application provides an electronic device, comprising a processor and a memory; wherein the memory is used to store a computer program, and the computer program is loaded and executed by the processor to implement the aforementioned method for calculating water droplet collection on the rotor surface in forward flight.

[0030] In a fourth aspect, the present application provides a computer-readable storage medium for storing a computer program, which, when executed by a processor, implements the aforementioned method for calculating water droplet collection on the rotor surface in forward flight.

[0031] In the present application, the calculation grid of the current rotor is first constructed, and the air flow field corresponding to the current rotor is determined according to the calculation grid based on several preset azimuth angles, and then the water droplet flow field corresponding to several azimuth angles of the current rotor is determined according to the air flow field, so as to determine the water droplet information of the rotor surface at various azimuth angles based on the water droplet flow field, and the water droplet information of the rotor surface at various azimuth angles is weighted averaged according to the preset weighting rule to obtain the water droplet collection situation of the rotor surface of the current rotor. In the forward flight flow field calculation in the present application, the forward flight periodic motion is decomposed, the flow field data of different azimuth angles are calculated and saved, and then the water droplet motion calculation is performed for each flow field, and finally the water droplet collection results of the surface under all azimuth angles are weighted averaged, so as to finally obtain the water droplet collection result of the rotor surface. In this way, the water droplet collection situation of the rotor surface with relative motion of components can be effectively calculated, and the contradiction between the relative position change of the blades in the forward flight state and the requirement that the position of the object remains unchanged in the water droplet collection calculation is overcome, so as to solve the problem of difficult prediction of icing of the forward flight rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0033] Figure 1 A flow chart of a method for calculating water droplet collection on a rotor surface in forward flight provided in this application;

[0034] Figure 2 A flow chart of calculation of water droplet collection on the rotor surface in forward flight provided by this application;

[0035] Figure 3 A flow chart of a specific method for calculating the collection of water droplets on the rotor surface in forward flight provided in this application;

[0036] Figure 4 A schematic diagram of the structure of a water droplet collection and calculation device for a rotor surface in forward flight provided by the present application;

[0037] Figure 5 A structural diagram of an electronic device provided for this application. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In the process of predicting the icing conditions on the rotor surface by means of computational fluid dynamics, water droplet transport and impact are the key intermediate processes. However, due to the changeable rotor motion modes and the difficulty in flow field calculation, the current calculation of water droplet collection characteristics is mainly for the simpler mode of hovering state, while helicopters are in forward flight most of the time, and it is difficult to perform the calculation process for water droplet collection involving the accumulation effect. In the forward flight flow field calculation in this application, the forward flight periodic motion is decomposed, the flow field data at different azimuths are calculated and saved, and then the water droplet motion calculation is performed for each flow field. Finally, the weighted average of the surface water droplet collection results at all azimuths is performed, which can effectively calculate the water droplet collection situation on the rotor surface with relative motion of components, and solve the problem of difficulty in predicting icing on the forward flight rotor.

[0040] See also Figure 1 As shown, an embodiment of the present invention discloses a method for calculating water droplet collection on a rotor surface in a forward flight state, comprising:

[0041] Step S11, constructing a computational grid for the current rotor, and determining an air flow field corresponding to the current rotor according to the computational grid based on a plurality of preset azimuth angles.

[0042] In this embodiment, in order to overcome the contradiction between the relative position change of the blades in the forward flight state and the requirement that the object position remain unchanged in the water droplet collection calculation, the rotor periodic motion can be instantaneously decomposed to obtain the water droplet collection characteristics of the rotor surface in the forward flight state. In this process, it is first necessary to calculate and save the unsteady periodic flow field of the rotor in the forward flight state for subsequent calculations. Specifically, when constructing the calculation grid of the current rotor, the rotor calculation shape of the current rotor can be determined, and the rotor calculation shape can be calculated. The preset grid generation software NNW-GridStar is used to generate the corresponding calculation topology and grid of the rotor calculation shape. , and it should be pointed out that due to the pitch change and flapping motion of the blades during forward flight, the above grid In this embodiment, overlapping grids are preferred.

[0043] Then, the unsteady air flow field information corresponding to the current rotor can be determined based on the above calculation grid based on a number of preset azimuth angles. First, the first calculation method, the first boundary condition and the parameter information of the current rotor are determined, and the calculation grid is used as the input data of the preset air flow field calculation program, so as to use the preset air flow field calculation program to determine the calculation result of the air flow field corresponding to the current rotor based on the calculation grid, the first calculation method, the first boundary condition and the parameter information. Figure 2 As shown, in this embodiment, air flow field calculation software or program can be used to grid As input, the air flow field calculation method, boundary conditions, forward flight speed, rotation speed, total pitch, negative twist angle, longitudinal and lateral periodic pitch change and other information are set. After the calculation converges, the grids at different time steps are obtained. Corresponding air flow field information.

[0044] In the above process, when determining and saving the air flow field corresponding to the current rotor, it is necessary to determine the number of rotor blades of the current rotor, and determine the air flow field calculation results corresponding to several azimuth angles as the air flow field according to the number of rotor blades and the preset azimuth angle interval. In this embodiment, when saving the air flow field information corresponding to several azimuth angles, it can be assumed that the rotor model contains paddle blades, and For angle intervals, save The calculation result of the air flow field corresponding to the azimuth angle is recorded as .

[0045] Step S12: determining the water droplet flow fields at several azimuth angles corresponding to the current rotor according to the air flow field.

[0046] In this embodiment, Figure 2 As shown, after the air flow fields corresponding to various azimuth angles are obtained, the water droplet flow field calculation software can be used to determine the water droplet flow fields corresponding to the air flow fields of several azimuth angles corresponding to the current rotor.

[0047] Step S13, determining the water droplet information on the rotor surface at each azimuth angle based on the water droplet flow field, and performing weighted averaging on the water droplet information on the rotor surface at each azimuth angle according to a preset weighting rule to obtain the water droplet collection status on the rotor surface of the current rotor.

[0048] In this embodiment, based on the obtained water droplet flow field, the water droplet information on the rotor surface expressed based on mass flow corresponding to each azimuth angle can be determined, and the water droplet information on the rotor surface at each azimuth angle is weighted averaged according to a preset weighting rule, so as to calculate the water droplet collection situation on the rotor surface of the current rotor.

[0049] In this embodiment, the problem that rotor icing directly affects aerodynamic performance and indirectly affects flight safety is taken into consideration. By establishing an accurate blade water droplet mass flow calculation method to improve the accuracy of helicopter icing prediction, the forward flight periodic motion can be decomposed, the azimuth angle can be determined at equal angle intervals, and the flow field information under the corresponding azimuth angle can be calculated. Then, the water droplet motion and impact calculation are performed for each flow field to obtain the surface water droplet impact characteristics on each blade. Finally, the water droplet collection results of all blade surfaces under all azimuth angles are weighted averaged to finally obtain the rotor surface water droplet collection results. In this way, the water droplet collection situation on the rotor surface with relative motion of components can be effectively calculated, solving the problem of difficulty in predicting forward flight rotor icing, and overcoming the problem that the forward flight of the helicopter has blade pitch change, waving and other manipulations, and this motion state is inconsistent with the relative stillness of the object required for the water droplet collection calculation.

[0050] Based on the previous embodiment, it can be known that the present application can decompose the forward flight periodic motion, calculate and save the flow field data of different azimuth angles, and then calculate the water droplet motion for each flow field, and finally perform weighted average on the surface water droplet collection results of all azimuth angles. Next, the specific process of determining the water droplet collection results will be described in detail in this embodiment. Figure 3 As shown, the embodiment of the present application discloses a specific method for calculating water droplet collection on the rotor surface in forward flight, including:

[0051] Step S21, determining the water droplet flow fields at several azimuth angles corresponding to the current rotor according to the air flow field.

[0052] In this embodiment, when determining the water droplet flow fields at several azimuth angles corresponding to the current rotor based on the air flow field, the wall suction boundary conditions corresponding to the current rotor are first set, and the second calculation method and the second boundary conditions of the water droplet flow field are determined; the second boundary conditions include the wall suction boundary conditions; and then the air flow field is used as input data of a preset water droplet flow field calculation program, so as to utilize the preset water droplet flow field calculation program to determine the water droplet flow field calculation results at several azimuth angles corresponding to the current rotor as the water droplet flow field based on the air flow field, the second calculation method and the second boundary conditions.

[0053] In this embodiment, based on the air flow field in the previous embodiment, the water droplet flow field calculation software or program can be used to calculate the air flow field. As input, the calculation method of water droplet flow field, boundary conditions and calculation conditions are set, among which the shape is calculated. The surface of is set as the wall suction boundary condition, which can be obtained by calculation The water droplet flow field results corresponding to the air flow field under azimuth angles are recorded as .

[0054] Step S22, determine the water droplet volume fraction and water droplet velocity of each grid point in the calculation grid corresponding to the rotor blade of the current rotor, and determine the mass flow rate of each azimuth angle corresponding to the water droplet flow field based on the water droplet volume fraction and the water droplet velocity, so as to use the mass flow rate as the water droplet information on the rotor surface.

[0055] In this embodiment, when calculating the water droplet collection situation on the rotor surface in the forward flight state, the water droplet volume fraction and water droplet velocity of each grid point in the calculation grid corresponding to the rotor blade of the current rotor are first determined, and then the mass flow rate at each azimuth angle corresponding to the water droplet flow field can be determined based on the water droplet volume fraction and the water droplet velocity, so that the mass flow rate can be used as the water droplet information on the rotor surface.

[0056] In this embodiment, mass flow is used to represent the water droplet collection on the rotor surface. For a given water droplet flow field result, , which corresponds to the mass flow rate on the blade The blade surface grid points The water drop volume fraction at and speed Calculated, the specific formula is:

[0057] ;

[0058] in is the water drop density, For appearance It is understandable that since the position of each blade is different at each azimuth angle, the mass flow rate of water droplets on their surface is also different, so it can be recorded as , then all The water droplet mass flow rate of all blades at the azimuth angle can be recorded as .

[0059] Step S23: performing weighted averaging on the mass flow rate based on the number of rotor blades of the current rotor and the number of azimuth angles, so as to obtain the water droplet collection situation on the rotor surface according to the weighted average result.

[0060] In this embodiment, the mass flow is weighted averaged based on the number of rotor blades and the number of azimuth angles of the current rotor, and the water droplet collection situation on the rotor surface can be obtained according to the weighted average result. Specifically, all the calculated water droplet mass flows can be weighted averaged according to the following formula:

[0061] .

[0062] In this embodiment, the water droplet flow field at several azimuth angles corresponding to the current rotor is first determined according to the air flow field, and the water droplet volume fraction and water droplet velocity of each grid point in the calculation grid corresponding to the rotor blade of the current rotor are determined. Then, the mass flow rate at each azimuth angle corresponding to the water droplet flow field can be determined according to the water droplet volume fraction and the water droplet velocity, so as to use the mass flow rate as the water droplet information on the rotor surface. Then, the mass flow rate is weighted averaged based on the number of rotor blades and the number of azimuth angles of the current rotor, and the water droplet collection situation on the rotor surface can be obtained according to the weighted average result. In this way, by calculating and saving the flow field data at different azimuth angles in the convergence state in the forward flight flow field calculation, the forward flight state is decomposed into several postures at equal angle intervals, and then the corresponding water droplet collection characteristics of the rotor surface are calculated in a quasi-steady manner in combination with the flow field data corresponding to each posture. Finally, all the water droplet collection characteristics in the entire cycle are weighted averaged to obtain the collection characteristics of the rotor surface in the forward flight state, which can effectively improve the surface water drop situation of the rotor in the forward flight state and solve the problem of difficult prediction of icing on the forward flight rotor.

[0063] See also Figure 4 As shown, the embodiment of the present application also discloses a device for calculating water droplet collection on a rotor surface in a forward flight state, comprising:

[0064] The air flow field determination module 11 is used to construct a calculation grid of the current rotor, and determine the air flow field corresponding to the current rotor according to the calculation grid based on a plurality of preset azimuth angles;

[0065] A water droplet flow field determination module 12, configured to determine the water droplet flow fields at the plurality of azimuth angles corresponding to the current rotor according to the air flow field;

[0066] The information averaging module 13 is used to determine the water droplet information on the rotor surface at each azimuth angle based on the water droplet flow field, and to perform weighted averaging on the water droplet information on the rotor surface at each azimuth angle according to a preset weighting rule to obtain the water droplet collection status of the rotor surface of the current rotor.

[0067] This embodiment first constructs a calculation grid of the current rotor, and determines the air flow field corresponding to the current rotor according to the calculation grid based on a number of preset azimuths, and then determines the water droplet flow field corresponding to the current rotor at a number of azimuths according to the air flow field, thereby determining the water droplet information on the rotor surface at each azimuth based on the water droplet flow field, and weighted averaging the water droplet information on the rotor surface at each azimuth according to a preset weighting rule to obtain the water droplet collection situation on the rotor surface of the current rotor. In this way, by decomposing the forward flight periodic motion in the forward flight flow field calculation, calculating and saving the flow field data at different azimuths, and then performing water droplet motion calculation for each flow field, and finally weighted averaging the water droplet collection results on the surface at all azimuths, the water droplet collection results on the rotor surface are finally obtained, which can effectively calculate the water droplet collection situation on the rotor surface with relative motion of components, overcome the contradiction between the relative position change of the blades in the forward flight state and the requirement that the object position remains unchanged in the water droplet collection calculation, and solve the problem of difficult prediction of icing on the forward flight rotor.

[0068] In some specific embodiments, the air flow field determination module 11 specifically includes:

[0069] The grid generation unit is used to determine the rotor calculation shape of the current rotor, and use preset grid generation software to generate a calculation grid corresponding to the rotor calculation shape; the calculation grid is an overlapping grid.

[0070] In some specific embodiments, the air flow field determination module 11 specifically includes:

[0071] A first parameter determination unit, used to determine a first calculation method of the air flow field, a first boundary condition and parameter information of the current rotor;

[0072] A flow field calculation unit is used to use the calculation grid as input data of a preset air flow field calculation program, so as to use the preset air flow field calculation program to determine the air flow field calculation result corresponding to the current rotor based on the calculation grid, the first calculation method, the first boundary condition and the parameter information.

[0073] In some specific embodiments, the air flow field determination module 11 specifically includes:

[0074] The air flow field determination unit is used to determine the number of rotor blades of the current rotor, and determine the air flow field calculation results corresponding to several azimuth angles as the air flow field according to the number of rotor blades and preset azimuth angle intervals.

[0075] In some specific embodiments, the water droplet flow field determination module 12 specifically includes:

[0076] A first condition setting unit, used to set a wall suction boundary condition corresponding to the current rotor;

[0077] A second condition setting unit, used to determine a second calculation method and a second boundary condition of the water droplet flow field; the second boundary condition includes the wall suction boundary condition;

[0078] A water droplet flow field determination unit is used to use the air flow field as input data of a preset water droplet flow field calculation program, so as to utilize the preset water droplet flow field calculation program to determine the water droplet flow field calculation results of the several azimuth angles corresponding to the current rotor based on the air flow field, the second calculation method and the second boundary condition as the water droplet flow field.

[0079] In some specific embodiments, the information averaging module 13 specifically includes:

[0080] A second parameter determination unit, used to determine the water drop volume fraction and water drop velocity of each grid point in the calculation grid corresponding to the rotor blade of the current rotor;

[0081] The water drop information determination unit is used to determine the mass flow rate of each azimuth angle corresponding to the water drop flow field according to the water drop volume fraction and the water drop velocity, so as to use the mass flow rate as the water drop information on the rotor surface.

[0082] In some specific embodiments, the information averaging module 13 specifically includes:

[0083] The information averaging unit is used to perform weighted averaging on the mass flow based on the number of rotor blades and the number of azimuth angles of the current rotor, so as to obtain the water droplet collection situation on the rotor surface according to the weighted averaging result.

[0084] Furthermore, the present application also discloses an electronic device. Figure 5 This is a structural diagram of an electronic device 20 according to an exemplary embodiment. The content in the diagram cannot be regarded as any limitation on the scope of use of the present application.

[0085] Figure 5 The present invention provides a schematic diagram of the structure of an electronic device 20 provided in an embodiment of the present application. The electronic device 20 may specifically include: at least one processor 21, at least one memory 22, a power supply 23, a communication interface 24, an input / output interface 25, and a communication bus 26. The memory 22 is used to store a computer program, which is loaded and executed by the processor 21 to implement the relevant steps in the method for calculating the water droplet collection on the rotor surface in the forward flight state disclosed in any of the aforementioned embodiments. In addition, the electronic device 20 in this embodiment may specifically be an electronic computer.

[0086] In this embodiment, the power supply 23 is used to provide working voltage for each hardware device on the electronic device 20; the communication interface 24 can create a data transmission channel between the electronic device 20 and the external device, and the communication protocol it follows is any communication protocol that can be applied to the technical solution of the present application, and is not specifically limited here; the input and output interface 25 is used to obtain external input data or output data to the outside world, and its specific interface type can be selected according to specific application needs and is not specifically limited here.

[0087] In addition, the memory 22, as a carrier for storing resources, can be a read-only memory, a random access memory, a disk or an optical disk, etc. The resources stored thereon can include an operating system 221, a computer program 222, etc., and the storage method can be temporary storage or permanent storage.

[0088] The operating system 221 is used to manage and control the hardware devices and computer program 222 on the electronic device 20, and can be Windows Server, Netware, Unix, Linux, etc. In addition to the computer program that can be used to complete the forward flight state rotor surface water droplet collection calculation method performed by the electronic device 20 disclosed in any of the aforementioned embodiments, the computer program 222 can further include computer programs that can be used to complete other specific tasks.

[0089] Furthermore, the present application also discloses a computer-readable storage medium for storing a computer program; wherein, when the computer program is executed by a processor, the aforementioned disclosed method for calculating the water droplet collection on the rotor surface in forward flight state is implemented. The specific steps of the method can be referred to the corresponding contents disclosed in the aforementioned embodiments, and will not be repeated here.

[0090] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0091] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0092] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0093] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0094] The technical solution provided by the present application is introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for general technicians in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for calculating water droplet collection on a rotor surface in forward flight, characterized in that: include: Constructing a computational grid of the current rotor, and determining an air flow field corresponding to the current rotor according to the computational grid based on a plurality of preset azimuth angles; Determine the water droplet flow fields at the several azimuth angles corresponding to the current rotor according to the air flow field; The water droplet information on the rotor surface at each azimuth angle is determined based on the water droplet flow field, and the water droplet information on the rotor surface at each azimuth angle is weighted averaged according to a preset weighting rule to obtain the water droplet collection status of the rotor surface of the current rotor.

2. The method for calculating water droplet collection on the rotor surface in forward flight according to claim 1, characterized in that: The step of constructing a computational grid of the current rotor includes: The rotor calculation shape of the current rotor is determined, and a calculation grid corresponding to the rotor calculation shape is generated using preset grid generation software; the calculation grid is an overlapping grid.

3. The method for calculating water droplet collection on the rotor surface in forward flight according to claim 1, characterized in that: The determining the air flow field corresponding to the current rotor according to the calculation grid based on the preset plurality of azimuth angles includes: Determining a first calculation method of the air flow field, a first boundary condition and parameter information of the current rotor; The calculation grid is used as input data of a preset air flow field calculation program, so as to utilize the preset air flow field calculation program to determine the air flow field calculation result corresponding to the current rotor based on the calculation grid, the first calculation method, the first boundary condition and the parameter information.

4. The method for calculating water droplet collection on the rotor surface in forward flight according to any one of claims 1 to 3, characterized in that: The determining of the air flow field corresponding to the current rotor comprises: The number of rotor blades of the current rotor is determined, and the air flow field calculation results corresponding to several azimuth angles are determined as the air flow field according to the number of rotor blades and a preset azimuth angle interval.

5. The method for calculating water droplet collection on the rotor surface in forward flight according to claim 4, characterized in that: The step of determining the water droplet flow fields at the plurality of azimuth angles corresponding to the current rotor according to the air flow field comprises: Setting the wall suction boundary condition corresponding to the current rotor; Determine a second calculation method and a second boundary condition of the water droplet flow field; the second boundary condition includes the wall suction boundary condition; The air flow field is used as input data of a preset water droplet flow field calculation program, so as to utilize the preset water droplet flow field calculation program to determine the water droplet flow field calculation results of several azimuth angles corresponding to the current rotor based on the air flow field, the second calculation method and the second boundary condition as the water droplet flow field.

6. The method for calculating water droplet collection on the rotor surface in forward flight according to claim 5, characterized in that: The determining of the water droplet information on the rotor surface at each azimuth angle based on the water droplet flow field includes: Determine the water drop volume fraction and water drop velocity of each grid point in the calculation grid corresponding to the rotor blade of the current rotor; The mass flow rate at each azimuth angle corresponding to the water droplet flow field is determined according to the water droplet volume fraction and the water droplet velocity, so as to use the mass flow rate as the water droplet information on the rotor surface.

7. The method for calculating water droplet collection on the rotor surface in forward flight according to claim 6, characterized in that: The weighted averaging of the water droplet information on the rotor surface at each azimuth angle according to a preset weighting rule includes: The mass flow is weighted averaged based on the number of rotor blades and the number of azimuth angles of the current rotor, so as to obtain the water droplet collection situation on the rotor surface according to the weighted average result.

8. A device for calculating water droplet collection on a rotor surface in forward flight, characterized in that: include: An air flow field determination module, used to construct a calculation grid of the current rotor, and determine the air flow field corresponding to the current rotor according to the calculation grid based on a plurality of preset azimuth angles; A water droplet flow field determination module, used to determine the water droplet flow fields at several azimuth angles corresponding to the current rotor according to the air flow field; An information averaging module is used to determine the water droplet information on the rotor surface at each azimuth angle based on the water droplet flow field, and to perform weighted averaging on the water droplet information on the rotor surface at each azimuth angle according to a preset weighting rule to obtain the water droplet collection status of the rotor surface of the current rotor.

9. An electronic device, characterized in that: The electronic device includes a processor and a memory; wherein the memory is used to store a computer program, and the computer program is loaded and executed by the processor to implement the method for calculating water droplet collection on the rotor surface in forward flight state as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: Used to store a computer program, which, when executed by a processor, implements the method for calculating water droplet collection on a rotor surface in forward flight as described in any one of claims 1 to 7.

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