EFFECTS OF PRIMARY HOLES ON THE VELOCITY FIELD IN A MODEL REVERSE FLOW COMBUSTOR
The characteristics of primary jets and their effects to the velocity fields in a model reverse flow combustor, which consisted primarily of an axial-radial swirl cup and the flame tube with primary holes and cooling air films, was investigated experimentally by a Particle Dynamic Analyzer (PDA) and a digital camera. The operation pressure and temperature were 200 KPa and 300K, respectively. The pressure lose of the combustor is 2.5％. By comparison with the previously reported data for the flow-field in straight flow combustors, it is concluded that, several conclusions could be abstained. The directions of primary jets into the reverse flow combustor were different from that into straight flow combustors. The primary jets from inner and outer combustor liner wall were extremely asymmetric. The inner jets inclined to the downstream direction, while the outer jets inclined to the upstream direction.The penetrations of the primary jets were very strong, nearly arriving to the opposite liner wall. And the length of the recirculation zone was as short as about 0.5D, which is distinctly shorter than 1.3D for straight-flow combustors.
reverse flow combustors swirl cup primary holes velocity profile
MENG Jiangtao HUANG Yong GUO Zhi-hui XU Xu
School of Jet Propulsion, National Key Laboratory on Aero-Engines,Beijing University of Aeronautics and Astronautics, 100083 P.R.China
国际会议
昆明
英文
109-112
2006-09-18（万方平台首次上网日期，不代表论文的发表时间）