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主流附体问题是逆流推力矢量喷管实际应用中可能遇到的最严重问题之一。当主流附体出现时,会造成推力矢量的失控,因此,在深入研究逆流推力矢量喷管主要气动、几何参数影响规律的同时,有必要关注逆流推力矢量喷管的主流附体问题。基于此,采用CFD数值模拟技术,分析了主流附体形成的机理、特点和主流附体发生过程,提出了采用提高抽吸压力和增加喷管主流压比两种实现附体主流脱体的控制方法。研究表明,尽管存在明显的滞后效应,但控制抽吸压力、主流压比是实现附体主流脱体的有效方法。
The mainstream attachment problem is one of the most serious problems that may be encountered in the practical application of counterflow thrust vectoring nozzle. Therefore, it is necessary to pay attention to the mainstream attachment problem of the thrust thrust vector nozzle while deeply studying the influence laws of the main aerodynamic and geometrical parameters of the thrust thrust vector nozzle. Based on this, CFD numerical simulation technique was used to analyze the formation mechanism and characteristics of mainstream attachments and the occurrence of mainstream appendages. The control of mainstream attachments was proposed by increasing suction pressure and increasing the mainstream pressure ratio method. Research shows that despite the apparent lag effect, but the control of suction pressure, the mainstream pressure ratio is an effective way to achieve the main body of the body off.