论文部分内容阅读
对6单元瓦状塞式喷管、6单元圆转方内喷管塞式喷管和1单元直排塞式喷管进行了实验和数值模拟研究。实验表明,3个塞式喷管具有良好的高度补偿特性和较高的效率,6单元瓦状塞式喷管和1单元直排塞式喷管在设计高度的效率接近100%;由于内喷管型面不够理想和加工时存在的缺陷,6单元圆转方内喷管塞式喷管的设计点效率在95%左右。数值模拟结果与实验数据吻合较好,结合实验和数值模拟分析了外界反压对气流,进而对底部气动特性的影响。实验研究了底部二次流流量变化对性能的影响。
The experimental and numerical simulations of 6-unit tile-type nozzle, 6-unit nozzle and 1-unit nozzle were carried out. Experiments show that the three plug nozzles have good height compensation characteristics and high efficiency. The efficiency of the 6-unit tile plug nozzle and the 1-unit straight plug nozzle at the design height is nearly 100% Tube surface is not ideal and processing defects exist, 6 unit round nozzle nozzle nozzle design efficiency of about 95%. The numerical simulation results are in good agreement with the experimental data. The effects of backpressure on the air flow and the aerodynamic characteristics at the bottom are analyzed by experiments and numerical simulations. Experimental study of the bottom of the secondary flow changes on the performance.