摘要
本文给出了高驻室压力条件下的化学、振动、电离非平衡喷管一维流动的方程组(包括 V-D 耦合和电离激发效应)。为了克服高压条件下喉道前空间推进步长小的困难,采用了局部平衡等效(?)的计算方法。对两类典型风洞(小尺寸电弧风洞和大尺寸激波风洞)进行了数值计算,并对不同驻室压力、V-D 耦合、电子激发效应、不同化学模型进行了研究。计算表明,高驻室压力能够有效抑制喷管的非平衡流动。在 P_0=200MPa,T_0=8000K 条件下,喷管出口的 O_2、N_2组分浓度已接近于实际大气。
A set of equations governing quasi-one-dimensional chem-ical,vibrational and ionization nonequilibrium nozzle flow for the highreservoir conditions with V-D coupling effect and eloctron excitationeffect was presented.In order to remove the problem of the small spacemarching step size,the method of an equivalent(?)and local equilibriumwas introduced.The influence of nonequilibrium properties has beenstudied.Numerical solutions obtained for the reservoir conditions of200MPa pressure and 8000K temperature have demonstrated that the highreservoir pressure can effectively suppress nozzle nonequilibrium.
