开启方式对短舱泄压门性能特性影响

对不同开启方式下短舱泄压门性能特性进行了数值模拟,并根据NACA TN4007报告中的试验数据验证了数值计算的正确性,在此基础上,研究了在不同马赫数(Ma=0.5,0.7,0.9)和不同压力比(Rp=1.2,1.4,1.6)下开启方式对泄压门排放性能和受力特性的影响。计算结果表明:在一定马赫数下,泄压门排放系数随压力比的增加而增加；而在一定压力比下,泄压门排放系数随马赫数的升高而减小；在开启方式2下泄压门排放系数略优于开启方式1下,由于开启方式1下泄压门平行于来流,因此开启方式1下泄压门推力系数远小于开启方式2下,而泄压门力矩系数高于开启方式2下,约为开启方式2下的2倍。 

Influence of opening mode on performance characteristics of nacelle pressure relief door

The performance of nacelle pressure relief door under different opening modes was numerically simulated, and the correctness of the numerical calculation was verified according to the experimental data in the NACA TN4007 report. On this basis, different Mach numbers (Ma=0.5, 0.7 and 0.9) and pressure ratios (Rp=1.2, 1.4 and 1.6) were compared for the effects on the discharge performance and force characteristics of the pressure relief door. The calculation results showed that under a certain Mach number, the discharge flow coefficient Cdr increased with the increase of pressure ratio. Under a certain pressure ratio, the discharge flow coefficient Cdr decreased with the increase of Mach number. In opening mode 2, discharge flow coefficient of the pressure relief door was slightly better than in opening mode 1. Since the pressure relief door was parallel to the flow in opening mode 1, the pressure relief coefficient of the pressure relief door was much smaller than that of opening mode 2, and the pressure coefficient of the pressure relief door was higher than that of opening mode 2, about twice of opening mode 2.