超声速飞行器减阻杆/盘与双喷流组合构型减阻和防热性能

In order to reduce aerodynamic and thermal loads of the supersonic vehicle， a combination model of aerospike/aerodisk and double jet was studied， and the effects of geometrical parameters and jet parameters on flow field characteristics， drag and heat flux reduction were analyzed numerically. The results showed that: the length-to-diameter ratio of the aerospike had little effect on the drag reduction efficiency of the configuration，but had a great effect on the heat flux reduction efficiency. When the diameter ratio of the aerodisk increased， the drag reduction efficiency of the configuration increased first and then decreased，and the heat flux reduction efficiency decreased first and then increased. However， when the total pressure of the opposing jet was high， the diameter ratio of aerodisk had little effect on the drag and heat flux reduction efficiency. When the total pressure ratio of the opposing jet increased，the drag and heat flux reduction efficiency of the configuration was kept at a high level，and the variation range was not obvious. When the total pressure ratio of the lateral jet increased，both the drag and heat flux reduction efficiency of the configuration increased， and the change rate of the drag reduction efficiency increased，while the change rate of the heat flux reduction efficiency decreased. The location of the lateral jet was far away from the blunt body， which increased the drag reduction efficiency and decreased the heat flux reduction efficiency. The drag reduction efficiency of 57.1% and heat flux reduction efficiency of 100.4% can be achieved by properly selecting the aerospike/aerodisk and double jet parameters.