Engine plume measuring device and method

Abstract

The invention provides an engine plume measuring device and method, and belongs to the technical field of engine performance testing. The engine plume measuring device comprises a plume characteristic measuring module which faces a plume injection direction, forms a certain angle theta with the plume injection direction and is used for measuring the temperature T and the pressure P generated by the injected plume at different positions on the plume characteristic measuring module; the plume force measurement module is arranged on one surface, deviating from the jetted plume, of the plume characteristic measurement module and is used for measuring the impact force of the plume borne by the plume characteristic measurement module; according to the terminal, the impact force is corrected according to the temperature T, the pressure P and the angle theta, and the thrust F of the engine is obtained. The measuring device is used in the measuring method. According to the measuring device, an engine structure with a plurality of fuel or gas input pipelines can be used as original, and the influence of a frame on a test result can be avoided. The measuring method provided by the invention is a thrust measuring method which is simple and easy to carry out.

Description

Technical Field

[0001] The invention belongs to the technical field of engine performance testing, and in particular relates to an engine plume measurement device and method. Background Art

[0002] Thrust is a key performance parameter of solid rocket engines, and the measurement of solid rocket engine thrust is also an important part of the engine design and development process. Testing the engine thrust can directly reflect the actual performance of the engine, help improve the accuracy of the engine thrust, and ensure the stability and reliability of the engine's working performance.

[0003] In the past, traditional measurement devices required the object to be measured to be placed on a thrust test bench to measure its thrust. The engine would be installed on a frame of a thrust test bench with a multi-degree-of-freedom force measuring device. This measurement method has some drawbacks: (1) the nozzle inlet, cooling water pipeline and other pipelines connected to it, as well as the thrust test bench, will affect the measurement results; (2) some engines that are too large or too heavy cannot be installed on the thrust test bench as a whole; (3) it is not suitable for laboratory-scale engines with smaller thrust. Summary of the invention

[0004] The present invention is made to solve the above-mentioned problem, and its object is to provide an engine plume measurement device and method.

[0005] The present invention provides an engine plume measurement device, which has the following characteristics and is used to test the plume ejected by a pre-fixed engine, and comprises: a plume characteristic measurement module, which faces the direction in which the plume is ejected and forms a certain angle θ with the plume, and is used to measure the temperature T and pressure P generated by the ejected plume at different positions on the plume; a plume force measurement module, which is arranged on the side of the plume characteristic measurement module away from the ejected plume, and is used to measure the impact force of the plume borne by the plume characteristic measurement module; and a terminal, which is connected to the plume characteristic measurement module and the plume force measurement module, and receives data signals of temperature T, pressure P and impact force, so as to correct the impact force according to the temperature T, pressure P and angle θ, and obtain the thrust F of the engine.

[0006] The engine plume measurement device provided by the present invention may also have the following features: wherein the plume characteristic measurement module includes: a force-bearing mechanism, facing the direction of the ejected plume, for bearing the impact of the plume; a number of temperature sensors, evenly arranged on the side of the force-bearing mechanism facing the plume, for measuring the temperature T generated by the plume on different areas of the force-bearing mechanism; a temperature processor, connected to the temperature sensor and the terminal, for converting the temperature T into a corresponding temperature signal and transmitting it to the terminal; a number of pressure sensors, evenly arranged on the side of the force-bearing mechanism facing the plume, for measuring the pressure P generated by the plume on different areas of the force-bearing mechanism; and a pressure processor, connected to the pressure sensor and the terminal, for converting the pressure P into a corresponding pressure signal and transmitting it to the terminal.

[0007] The engine plume measurement device provided by the present invention may also have the following features: the temperature sensor and the pressure sensor are evenly distributed radially outward from the center of one side of the force-bearing mechanism, and the arrangement directions of the temperature sensor and the pressure sensor are perpendicular to each other.

[0008] The engine plume measuring device provided by the present invention may also have the following feature: wherein the force-bearing mechanism is a circular baffle or a block.

[0009] The engine plume measuring device provided by the present invention may also have the following feature: wherein the angle between the circular baffle and the injection direction of the plume is θ.

[0010] The engine plume measuring device provided by the present invention may also have the following features: wherein the block is a beveled cylinder, the axis of the beveled cylinder is parallel to the injection direction of the plume, and the angle between the beveled surface and the injection direction of the plume is θ.

[0011] The engine plume measurement device provided by the present invention may also have the following feature: wherein 0°<θ<90° or 90°<θ<180°.

[0012] The engine plume measurement device provided by the present invention may also have the following features: wherein the plume force measurement module includes: a bracket, which is arranged on the side of the force-bearing mechanism away from the plume, and is used to support the force-bearing mechanism; a bearing, which is arranged on the bracket, and is used to fix the bracket; and a force sensor, which is arranged at one end of the bracket away from the force-bearing mechanism, and is used to indirectly measure the impact force of the plume borne by the force-bearing mechanism through the bracket.

[0013] The present invention also provides an engine plume measurement method, which has the following characteristics, using any of the aforementioned engine plume measurement devices, and includes the following steps: S10, using a fixing device to fix the nozzle and the associated pipelines of the engine to be tested; S20, assembling the various components of the engine plume measurement device, and making the plume characteristic measurement module as a whole form a certain angle θ with the nozzle; S30, starting the engine, and the engine ejects the plume through the nozzle and impacts the force-bearing mechanism of the plume characteristic measurement module; S40, the temperature sensor and the pressure sensor respectively measure the temperature T and pressure P at different positions of the force-bearing mechanism facing the plume side, and the force sensor measures the impact force received by the force-bearing mechanism as a whole; S50, the terminal corrects the impact force according to the temperature T, the pressure P and the angle θ to obtain the thrust F of the engine.

[0014] The engine plume measurement method provided by the present invention may also have the following feature: wherein, in step S50, the shape of the plume when it impacts the force-bearing mechanism is also obtained based on the temperature T and the pressure P.

[0015] Functions and Effects of the Invention

[0016] According to the engine plume measurement device and method involved in the present invention, the measurement device includes a plume characteristic measurement module, facing the direction of the plume ejection and forming a certain angle θ therewith, for measuring the temperature T and pressure P generated by the ejected plume at different positions thereon; a plume force measurement module, arranged on the side of the plume characteristic measurement module away from the ejected plume, for measuring the impact force of the plume borne by the plume characteristic measurement module; and a terminal, connected to the plume characteristic measurement module and the plume force measurement module, receiving data signals of temperature T, pressure P and impact force, thereby correcting the impact force according to temperature T, pressure P and angle θ to obtain the thrust F of the engine. The measurement method uses a measurement device.

[0017] Therefore, in the measuring device of the present invention, since the engine and the force measuring device are not connected together, there is no interference with the thrust test result caused by various pipelines or thrust benches, so the engine structure with multiple input fuel or gas pipelines can be used as it is, and the influence of the frame on the test result can also be avoided. The measuring method of the present invention is therefore a simple and easy-to-perform thrust measurement method. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of a plume impacting the engine plume measuring device of Example 1 of the present invention;

[0019] Figure 2 1 is a schematic diagram of the planar structure of a plume characteristic measurement module of an engine plume measurement device according to Embodiment 1 of the present invention;

[0020] Figure 3 is a flowchart of an engine plume measurement method according to Embodiment 1 of the present invention;

[0021] Figure 4 is a schematic diagram of a plume impacting an engine plume measurement device according to Embodiment 2 of the present invention;

[0022] Figure 5 It is a schematic structural diagram of a plume characteristic measurement module of an engine plume measurement device according to Embodiment 2 of the present invention. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the following embodiments are combined with the accompanying drawings to specifically illustrate an engine plume measurement device and method of the present invention.

[0024] <Example 1>

[0025] Figure 1 It is a schematic diagram of a plume impacting the engine plume measuring device of Example 1 of the present invention.

[0026] like Figure 1 As shown, this embodiment provides an engine plume measurement device 100 for testing the plume ejected from a pre-fixed engine, wherein the plume is ejected from a tail pipe 1 of the engine.

[0027] The engine plume measurement device 100 comprises a plume characteristic measurement module 10, a plume force measurement module 20 and a terminal (not shown in the figure).

[0028] Figure 2 It is a schematic diagram of the planar structure of the plume characteristic measurement module of the engine plume measurement device of Example 1 of the present invention.

[0029] like Figure 1 and Figure 2 As shown, the plume characteristic measurement module 10 includes a force-bearing mechanism 11 , a temperature sensor 12 , a temperature processor 13 , a pressure sensor 14 and a pressure processor 15 .

[0030] The force receiving mechanism 11 is a circular baffle, the center of which is located at the central axis of the plume ejected from the tail pipe 1. In this embodiment, the plane where the force receiving mechanism 11 is located forms a certain angle θ with the direction of the ejected plume, 0°<θ<90° or 90°<θ<180°.

[0031] There are a plurality of temperature sensors 12 which are evenly distributed vertically and radially outward from the center of the force-bearing mechanism 11 , and are used to measure the temperature T generated by the plume on different areas of the force-bearing mechanism 11 .

[0032] The temperature processor 13 is connected to the temperature sensor 12 and is used to convert the temperature T into a corresponding temperature signal.

[0033] There are a plurality of pressure sensors 14 which are evenly distributed horizontally outward from the center of the force-bearing mechanism 11 along its radial direction, and are used to measure the pressure P generated by the plume on different areas of the force-bearing mechanism 11 .

[0034] The pressure processor 15 is connected to the pressure sensor 14 and is used to convert the pressure P into a corresponding pressure signal.

[0035] The plume force measurement module 20 includes a bracket 21 , a bearing 22 and a force sensor 23 .

[0036] The bracket 21 is arranged on a side of the force-bearing mechanism 11 facing away from the plume and the connection point is located at the center point of the force-bearing mechanism plate 11 . The bracket 21 is used to support the force-bearing mechanism 11 .

[0037] The bearing 22 is disposed on the bracket 21 and is used to fix the bracket 21 .

[0038] The force sensor 23 is disposed at one end of the bracket 21 away from the force-bearing mechanism 11 , and is used to indirectly measure the impact force of the plume borne by the force-bearing mechanism 11 through the bracket 21 .

[0039] The terminal (not shown in the figure) is connected to the temperature processor 13, the pressure processor 15 and the force sensor 23, and receives the corresponding temperature signal, pressure signal and impact force signal generated by the temperature T, pressure P and impact force, so as to correct the impact force according to the temperature T, pressure P and angle θ to obtain the thrust F of the engine.

[0040] Figure 3 It is a flowchart of the engine plume measurement method according to the first embodiment of the present invention.

[0041] like Figure 3 As shown, this embodiment also provides an engine plume measurement method, which uses the engine plume measurement device 100 in this embodiment and includes the following steps:

[0042] S10, using a fixing device to fix the nozzle 1 and the associated pipelines of the engine to be tested.

[0043] S20 , assembling the components of the engine plume measurement device 100 , and making the force-bearing mechanism 11 form a certain angle with the central axis of the nozzle 1 .

[0044] S30, the engine is turned on, and the engine ejects a plume through the nozzle 1 and impacts the force-bearing mechanism 11.

[0045] S40, the temperature sensor 12 and the pressure sensor 14 respectively measure the temperature T and the pressure P at different positions of the force-bearing mechanism 11, and the force sensor 23 measures the impact force received by the force-bearing mechanism 11 as a whole.

[0046] S50, the terminal corrects the impact force according to the temperature T, the pressure P and the angle θ to obtain the thrust F of the engine; and obtains the shape of the plume when it impacts the force-bearing mechanism 11 according to the temperature T and the pressure P.

[0047] <Example 2>

[0048] Figure 4 is a schematic diagram of a plume impacting an engine plume measurement device according to Embodiment 2 of the present invention; Figure 5 It is a schematic structural diagram of a plume characteristic measurement module of an engine plume measurement device according to Embodiment 2 of the present invention.

[0049] like Figure 4 and 5 As shown, this embodiment provides an engine plume measurement device 100 ′, comprising a plume characteristic measurement module 10 ′, a plume force measurement module 20 and a terminal (not shown in the figure).

[0050] The plume characteristic measurement module 10 ′ includes a force-bearing mechanism 11 ′, a temperature sensor (not shown in the figure), a temperature processor (not shown in the figure), a pressure sensor (not shown in the figure) and a pressure processor (not shown in the figure).

[0051] Among them, the settings of the temperature sensor, temperature processor, pressure sensor, pressure processor, plume force measurement module 20 and terminal are generally similar to those in Example 1 and will not be repeated. The only difference is that the force-bearing mechanism 11' is a block of a beveled cylindrical structure, the axis of the beveled cylinder is parallel to the injection direction of the plume, and the angle between its bevel and the injection direction of the plume is θ.

[0052] Functions and Effects of the Embodiments

[0053] An engine plume measurement device provided according to the present embodiment is used to test the plume ejected by a pre-fixed engine, and comprises: a plume characteristic measurement module, facing the direction in which the plume is ejected and forming a certain angle θ therewith, and used to measure the temperature T and pressure P generated by the ejected plume at different positions thereon; a plume force measurement module, arranged on the side of the plume characteristic measurement module away from the ejected plume, and used to measure the impact force of the plume borne by the plume characteristic measurement module; and a terminal, connected to the plume characteristic measurement module and the plume force measurement module, receiving data signals of temperature T, pressure P and impact force, thereby correcting the impact force according to the temperature T, pressure P and angle θ to obtain the thrust F of the engine.

[0054] Therefore, in the measuring device of this embodiment, since the engine and the force measuring device are not connected together, there is no interference with the thrust test results due to various pipelines or thrust test benches. Therefore, the engine structure with multiple input fuel or gas pipelines can be used as is. In addition, the influence of the frame on the test results can also be avoided.

[0055] Furthermore, the plume characteristic measurement module includes: a force-bearing mechanism, facing the direction of the ejected plume, for bearing the impact of the plume; a plurality of temperature sensors, evenly arranged on the side of the force-bearing mechanism facing the plume, for measuring the temperature T generated by the plume on different regions of the force-bearing mechanism; a temperature processor, connected to the temperature sensor and the terminal, for converting the temperature T into a corresponding temperature signal and transmitting it to the terminal; a plurality of pressure sensors, evenly arranged on the side of the force-bearing mechanism facing the plume, for measuring the pressure P generated by the plume on different regions of the force-bearing mechanism; and a pressure processor, connected to the pressure sensor and the terminal, for converting the pressure P into a corresponding pressure signal and transmitting it to the terminal. The temperature sensors and pressure sensors are evenly distributed from the center of one side of the force-bearing mechanism along the radial direction thereof, and the arrangement directions of the temperature sensors and the pressure sensors are perpendicular to each other. In this way, the force-bearing mechanism is subjected to a uniform impact force, and the temperature and pressure signals at different points along the radial direction of its surface can be measured and transmitted to the terminal for subsequent analysis and processing.

[0056] Furthermore, the force-bearing mechanism is a circular baffle or a block. The angle between the circular baffle and the spray direction of the plume is θ; the block is a chamfered cylinder, the axis of which is parallel to the spray direction of the plume, and the angle between the chamfered surface and the spray direction of the plume is θ. In this arrangement, the circular baffle or block, which is a simple and inexpensive force-bearing object, is used, and its structure is much simpler than the thrust table frame.

[0057] Furthermore, 0°<θ<90° or 90°<θ<180°. This arrangement avoids the impact of plume recoil on engine thrust at an angle of 90°.

[0058] Furthermore, the plume force measurement module includes: a bracket, which is arranged on the side of the force-bearing mechanism away from the plume, for supporting the force-bearing mechanism; a bearing, which is arranged on the bracket, for fixing the bracket; and a force sensor, which is arranged at the end of the bracket away from the force-bearing mechanism, for indirectly measuring the impact force of the plume borne by the force-bearing mechanism through the bracket. With such an arrangement, the plume force measurement module can simply and efficiently measure the impact force generated by the plume on the force-bearing mechanism.

[0059] According to an engine plume measurement method provided by this embodiment, any of the above-mentioned engine plume measurement devices is used, because the following steps are included: S10, using a fixing device to fix the nozzle and the attached pipelines of the engine to be tested; S20, assembling the various components of the engine plume measurement device, and making the plume characteristic measurement module as a whole form a certain angle θ with the nozzle; S30, starting the engine, the engine ejects the plume through the nozzle and impacts the force-bearing mechanism of the plume characteristic measurement module; S40, the temperature sensor and the pressure sensor respectively measure the temperature T and pressure P at different positions of the force-bearing mechanism facing the plume, and the force sensor measures the impact force received by the force-bearing mechanism as a whole; S50, the terminal corrects the impact force according to the temperature T, the pressure P and the angle θ to obtain the thrust F of the engine. The shape of the plume when it impacts the force-bearing mechanism is also obtained according to the temperature T and the pressure P.

[0060] Therefore, the engine plume measurement method of this embodiment is a simple, cheap and easy-to-perform thrust measurement method.

[0061] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An engine plume measurement device, characterized in that: For testing the plume emitted by a pre-mounted engine, including: A plume characteristic measurement module, facing the direction in which the plume is ejected and forming a certain angle θ therewith, and used to measure the temperature T and pressure P generated by the ejected plume at different positions thereon; a plume force measuring module, disposed on a side of the plume characteristic measuring module away from the ejected plume, and used to measure the impact force of the plume borne by the plume characteristic measuring module; and The terminal is connected to the plume characteristic measurement module and the plume force measurement module, and receives the data signals of the temperature T, the pressure P and the impact force, so as to correct the impact force according to the temperature T, the pressure P and the angle θ to obtain the thrust F of the engine.

2. The engine plume measurement device according to claim 1, Features: in, The plume characteristic measurement module comprises: A force-bearing mechanism, facing the direction of the ejected plume, and used for bearing the impact of the plume; A plurality of temperature sensors are evenly arranged on a side of the force-bearing mechanism facing the plume, and are used to measure the temperature T generated by the plume on different areas of the force-bearing mechanism; A temperature processor, connected to the temperature sensor and the terminal, for converting the temperature T into a corresponding temperature signal and transmitting the signal to the terminal; A plurality of pressure sensors, uniformly arranged on a side of the force-bearing mechanism facing the plume, for measuring the pressure P generated by the plume on different areas of the force-bearing mechanism; and A pressure processor is connected to the pressure sensor and the terminal, and is used to convert the pressure P into a corresponding pressure signal and transmit it to the terminal.

3. The engine plume measurement device according to claim 2, characterized in that: in, The temperature sensor and the pressure sensor are evenly distributed from the center of one side of the force-bearing mechanism along the radial direction outward. The temperature sensor and the pressure sensor are arranged perpendicularly to each other.

4. The engine plume measurement device according to claim 2, characterized in that: in, The force-bearing mechanism is a circular baffle or a baffle.

5. The engine plume measurement device according to claim 4, characterized in that: in, The angle between the circular baffle and the spray direction of the plume is θ.

6. The engine plume measurement device according to claim 4, characterized in that: in, The stopper is a beveled cylinder, the axis of which is parallel to the spraying direction of the plume, and the angle between the beveled surface and the spraying direction of the plume is θ.

7. The engine plume measurement device according to claim 1, characterized in that: in, 0°<θ<90° or 90°<θ<180°.

8. The engine plume measurement device according to claim 2, Features: Wherein, the plume force measurement module comprises: A bracket, arranged on a side of the force-bearing mechanism facing away from the plume, for supporting the force-bearing mechanism; a bearing, disposed on the bracket and used to fix the bracket; and The force sensor is arranged at one end of the bracket away from the force-bearing mechanism, and is used for indirectly measuring the impact force of the plume borne by the force-bearing mechanism through the bracket.

9. A method for measuring engine plume, characterized in that: The engine plume measurement device according to any one of claims 1 to 8 is used, comprising the following steps: S10, fixing the nozzle and associated pipelines of the engine to be tested using a fixing device; S20, assembling the components of the engine plume measurement device, and making the plume characteristic measurement module as a whole form a certain angle θ with the nozzle; S30, starting the engine, the engine ejecting a plume through the nozzle and impacting the plume characteristic measurement module's force receiving mechanism; S40, the temperature sensor and the pressure sensor respectively measure the temperature T and the pressure P at different positions of the force-bearing mechanism facing the plume, and the force sensor measures the impact force received by the force-bearing mechanism as a whole; S50, the terminal corrects the impact force according to the temperature T, the pressure P and the angle θ to obtain the thrust F of the engine.

10. The engine plume measurement method according to claim 9, characterized in that: in, In step S50, the shape of the plume when it impacts the force-bearing mechanism is also obtained according to the temperature T and the pressure P.

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