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An Experimental Study on Startup Characteristics of a Center Body Diffuser for High Altitude Simulation
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 Title & Authors
An Experimental Study on Startup Characteristics of a Center Body Diffuser for High Altitude Simulation
Yeon, Hae In; You, Isang; Kim, Wan Chan; Im, Ji Nyeong; Ko, Young Sung;
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An experimental study has been conducted to verify the startup characteristic of a Center Body Diffuser (CBD) for simulating a low pressure environment when at high altitudes. Vacuum chamber pressure and startup characteristics of the CBD were investigated according to various geometries of the center body structure by a cold gas flow test. The test results show that the startup pressure is lowest when the center body contraction angle is approximately . The startup characteristic of the CBDs significantly improves when the diffuser inlet length () is decreasing and the divergence length () is increasing. Additionally, it is possible to simulate various high altitude, low pressure conditions for various rocket engines that have different nozzle expansion ratios by adjusting the center body's position inside the diffuser.
Center Body Diffuser;High Altitude Environment Simulation;Supersonic Exhaust Diffuser;Vacuum Chamber;
 Cited by
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