关键词: 室内试车台, 流场特性, 矢量发动机, 喷管偏转

Abstract: The numerical simulation method was used to study the flow field characteristics of a certain type of indoor test bench. It was found that the flow field structure of the test workshop was uniform when the nozzle of the vectoring engine was directly arranged, the total pressure of the air flow in the test workshop decreases gradually along the flow direction. When the air flow passes through the muffler in the intake tower, the total pressure loss is the largest, reaching 0.38% . On this basis, the flow field characteristics of the test shop when the engine nozzle deflects are further investigated, and the influence of the nozzle deflecting angle on the flow field characteristics of the test shop is given, when the nozzle deflects 5°, a large range of eddy current appears in the ejector barrel, which forms a flow jam and greatly reduces the ejector flow in the test workshop, the ejector flow increases and the vortex disappears when the nozzle deflects 15° . The aerodynamic parameters of the flow field in the test workshop are all affected by the deflection angle of the nozzle, and the maximum ejector coefficient is 10.97 when the nozzle deflects 20°.