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为了获得水冲压发动机构型对其燃烧性能的影响,采用中等金属含量燃料研究了四种发动机构型一次加水后的燃烧性能,试验得到了发动机压强、燃烧效率和喷射效率等性能参数。试验表明,不同发动机构型对发动机工作过程存在较大影响,发动机进水后存在收敛段,会出现压强振荡现象,收敛段也会降低喷射效率。金属燃料自持燃烧产物通过喷孔进入补燃室与水发生反应,虽可消除发动机压强振荡现象,但燃烧室会产生大量残渣。将燃烧室和补燃室直接相连,可实现发动机稳定工作,提高喷射效率。
In order to obtain the influence of hydraulic ramjet configuration on its combustion performance, the combustion performance of four engine configurations after a single addition of water was investigated by using medium-level fuel. The performance parameters of engine pressure, combustion efficiency and injection efficiency were obtained. The test shows that different engine configurations have a great influence on the working process of the engine. There is a convergence section after the engine enters the water, and the pressure oscillation phenomenon occurs. The convergence section also reduces the injection efficiency. Metallic fuel self-sustaining combustion products through the nozzle into the combustion chamber to react with water, although the elimination of engine pressure oscillations, but the combustion chamber will have a lot of residue. Directly connect the combustion chamber with the afterburning chamber to achieve stable engine operation and improve the injection efficiency.