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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2010, Vol. 31 ›› Issue (8): 1538-1545.

• Fluid Mechanics and Flight Mechanics • Previous Articles     Next Articles

Similarity of Combustion Flowfield in a Single Element Gas-gas Injector Chamber

Wang Xiaowei, Gao Yushan, Jin Ping, Cai Guobiao   

  1. School of Astronautics, Beijing University of Aeronautics and Astronautics
  • Received:2008-07-12 Revised:2009-12-19 Online:2010-08-25 Published:2010-08-25
  • Contact: Cai Guobiao

Abstract: Single-element shear-coaxial injector heat sink chambers are designed with shear-coaxial injectors. Gaseous hydrogen and gaseous oxygen are chosen as propellants. Hot-fire tests at seven chamber pressures from 0.92 to 6.10 MPa are conducted in the same chamber, and two geometrically similar chambers are tested at the same chamber pressure. When the chamber pressure and the chamber size change, the propellant temperatures, mixture ratio, and the injection velocities are kept constant. Wall temperature measurements are utilized to compare the characteristics of the combustion flowfields in the tests. The results indicate that the combustion flowfields of different chamber pressures and chamber geometries are actually similar.

Key words: similarity, combustion, full flow stage combustion cycle, gas-gas injector, single element

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