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为增强超声速燃烧过程中的燃料掺混,设计了一种被动式燃料掺混增强结构:气动斜坡/燃气发生器组合燃料喷注结构,并在直连式超燃试验台上对这种喷注结构进行了纹影、油流谱等冷试和热试试验.同时数值模拟了超声速流场中气动斜坡/燃气发生器组合结构的流动及燃烧特性.结果表明:气动斜坡/燃气发生器组合结构有助于燃料的掺混,掺混效率由单独气动斜坡喷注器情况下的60%提高到了75%;总压损失主要由壁面摩擦产生,气动斜坡和燃气发生器产生的总压损失相对较少;作为燃烧室点火器使用的燃气发生器起着点火和助燃的双重作用.
In order to enhance the fuel blending in the supersonic combustion process, a passive fuel blending enhancement structure is designed: a pneumatic ram / gas generator combined fuel injection structure, and this injection structure The experiments of cold test and thermal test were carried out, such as smear and oil flow spectrum, and the numerical simulation of the flow and combustion characteristics of the aerodynamic slope / gas generator combinational structure in the supersonic flow field was carried out. The results show that the aerodynamic slope / gas generator combinatorial structure has The blending efficiency is increased from 60% to 75% in the case of single pneumatic ram injector; the total pressure loss is mainly caused by wall friction and the total pressure loss from the pneumatic ramp and the gas generator is relatively small ; As a combustion chamber igniter gas generator plays a dual role of ignition and combustion.