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Fuel Droplet Evaporation Combustion Experimental Device and Application Method under High Pressure and Oscillating Environment
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An experimental device, droplet evaporation technology, applied in the field of fuel droplet evaporation and combustion experimental devices
Active Publication Date: 2022-02-22
PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
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However, the existing experimental devices are difficult to meet the requirements of experiments under various working conditions at the same time
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Embodiment 1
[0157] like Figure 5 As shown, when the sound velocity is 340m / s and the frequency is 1000Hz, the sound wavewavelength is 340mm. The units of dimensions involved in the drawings are mm.
[0158] (1) When the droplet is required to be at a standing wave node, first, calculate the distance from the left and right speakers to the droplet:
[0159] 340÷2=170 (mm)
[0160] Second, calculate the distance from the drop to the outside of the left and right end caps:
[0161] 210÷2+500+30=635 (mm) (left)
[0162] 210÷2+360+30=495 (mm) (right)
[0163] Again, calculate the length of the loudspeaker unit inside the closed container:
[0164] 635-170=465 (mm) (left)
[0165] 495-170=325 (mm) (right)
[0166] Finally, calculate the length of the speaker's threaded pushrod protruding from the end cap:
[0167] 580-465=115 (mm) (left)
[0168] 440-325=115 (mm) (right)
[0169] That is, when the threaded push rod of the left speaker and the threaded push rod of the right speaker b...
Embodiment 2
[0192] The experimental device for evaporation and combustion of fuel droplets in a high-pressure and oscillating environment of this embodiment has the same structure as that of Embodiment 1, the difference being that this embodiment is used to adjust the relative positions of speakers at different acoustic frequencies. When studying the problem at the antinode of the standing wave at different acoustic frequencies, it is only necessary to adjust the position of the loudspeaker relative to the previous step. In order to describe this embodiment more clearly, in conjunction with the attached Image 6 Describe the specific implementation steps:
[0193] When the sound velocity is 340m / s and the frequency is 1000Hz, the sound wavewavelength is 340mm. When the droplet is on the right antinode, the situation is (2) in the above-mentioned embodiment 1.
[0194] (1) When the sound velocity is 340m / s and the frequency is adjusted to 800Hz, the wavelength is still 425mm. When stud...
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Abstract
The invention discloses a fuel droplet vaporization and combustion experiment device under high pressure and vibration environment and its use method, comprising a pressure vessel, a pressure regulation system, a pressure test system, an injector, a fuel droplet phase adjustment device, an ignition device and a high-speed photography system. The pressure vessel includes a combustion chamber, a left compartment and a right compartment; the length of the left compartment is greater than that of the right compartment; the fuel droplet phase adjustment device includes an acoustic system and an acoustic system position adjustment device; the acoustic system position adjustment device is used to adjust The phase of the sound wave where the fuel droplets are; two detachable observation windows are symmetrically arranged on both sides of the combustion chamber; the high-speed photography system includes a background light source and a high-speed camera. The invention has a visualized test, and the observation window can be disassembled to facilitate the replacement of the ignition head; in addition, it can quickly adjust the relative position of the speaker, so that the fuel droplets are in the required phase; and can realize the hanging drop operation in a high-pressure environment.
Description
technical field [0001] The invention relates to the research fields of liquid rocket engines, aviation jet engines, etc., in particular to an experimental device for evaporation and combustion of fuel droplets in a high-pressure and oscillating environment and a method for using it. Background technique [0002] The experimental device for evaporative combustion of fuel droplets is generally used in research fields such as liquid rocket engines and aviation jet engines. [0003] The liquid rocket engine powers the aircraft by converting the chemical energy of the liquid propellant carried by the aircraft itself into thermal energy and then into kinetic energy, which has an important impact on the aerospace and national defense fields. The reliability, stability, and compatibility of liquid rocket engines have always been the main problems to be solved in the development process, which are closely related to the spray combustion process of liquid propellant in the thrust cham...
Claims
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Patent Type & Authority Patents(China)
IPC IPC(8): G01M15/02G01M15/14
CPCG01M15/02G01M15/14
Inventor 王辉闫常春聂万胜苏凌宇包恒侯志勇
Owner PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
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