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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2018, Vol. 39 ›› Issue (9): 22221-022221.doi: 10.7527/S1000-6893.2018.22221

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Review on gas liquid shear coaxial injector in liquid rocket engine

KANG Zhongtao1, LI Xiangdong1, MAO Xiongbing1, LI Qinglian2   

  1. 1. Science and Technology on Scramjet Laboratory, Hypervelocity Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang 621000, China;
    2. Science and Technology on Scramjet Laboratory, National University of Defense Technology, Changsha 410073, China
  • Received:2018-04-18 Revised:2018-05-14 Online:2018-09-15 Published:2018-06-20
  • Supported by:
    Program for New Century Excellent Talents in University(NCET-13-0156); National Natural Science Foundation of China(11472303, 11402298); National Basic Research Program of China(613239)

Abstract: The gas liquid shear coaxial injector is widely used in the bipropellant liquid rocket engine. Commonly, this type of injector consists of a jet orifice in the center and an annular aperture. The operating characteristics of the gas liquid shear coaxial injector can be divided into atomization characteristics and combustion characteristics. The atomization characteristics involves the jet breakup mechanism and the spray characteristics with the coaxial gas flow, effects of high pressure and temperature in real liquid rocket engine, effects of back pressure oscillation when combustion instability occurs, self-pulsation, etc. The combustion characteristics include the mechanism of flame stabilization, flame structure, and effects of high pressure and temperature in the real liquid rocket engine. The present study reviews the aforementioned atomization and combustion characteristics of the gas liquid shear coaxial injector to deepen the understanding of the working process of the gas liquid shear coaxial injector.

Key words: liquid rocket engine, gas liquid shear coaxial injector, atomization, combustion characteristics, combustion instability

CLC Number: