论文部分内容阅读
为得到双层壁扩压器与波瓣组合的引射混合效果 ,用七孔探针测试了流动的速度场和压力场 ,借助进口流量管、维辛斯基型面收敛段和笛形动压管测出了主次流的流量。结果表明 :波瓣除了引射次流之外 ,在双层壁之间还引射了环境气流 ;扩压角小于 1 0°,引射流量比的理论值与试验值符合较好 ,扩压角增大引射流比和双层壁间的引射流量比都增大 ;扩压角大于 1 0°时 ,扩压角增大引射流量比和双层壁间的引射流量比下降 ,而理论计算的引射流量比却增大。此外 ,还获得了主次流截面比、主流速度等参数对引射流量比、双层壁间引射流量比和流动速度分布的影响结果。
In order to obtain the mixing effect of the double-wall diffuser and the lobe combination, the velocity field and the pressure field of the flow were tested by a seven-hole probe. With the aid of the inlet flow tube, Pressure pipe measured the primary and secondary flow. The results show that the lobe induces the ambient air flow between the double walls in addition to the secondary flow, the divergence angle is less than 10 °, and the theoretical value of the jet flow ratio is in good agreement with the experimental value. The ratio of the angle of increasing jet and the jet flow ratio of double wall increased. When the jetting angle was greater than 10 °, the jet flow ratio of diffuser angle increased and the jet flow ratio of double wall decreased, The theoretical calculation of the jet flow ratio has increased. In addition, the effects of the main flow ratio, the main flow velocity and other parameters on the jet flow ratio, the jet flow ratio between the double walls and the flow velocity distribution were also obtained.