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为了快速准确地得到双模态超燃燃烧室性能,对已有准一维非稳态方法进行了研究,发现当燃烧室工作在亚燃模态时此方法不能正确预测预燃激波串的压力变化趋势。将预燃激波串模型耦合到准一维非稳态方法中,得到一种改进的准一维非稳态计算方法。通过四组不同算例验证表明,此方法能准确地预测双模态超燃燃烧室的压力变化趋势,同时也能准确地捕捉到压力峰值,具有较高的精度和较好的适用性。
In order to get the performance of the bimodal combustion chamber quickly and accurately, a quasi-one-dimensional unsteady method has been studied. It is found that this method can not correctly predict the pre-ignition wave train when the combustion chamber operates in the sub-combustion mode Pressure changes. The pre-fired shock wave train is coupled to quasi-one-dimensional unsteady method, and an improved quasi-one-dimensional unsteady method is obtained. The results of four different examples show that this method can accurately predict the pressure change trend of the dual-mode combustor and can accurately capture the peak pressure with high precision and good applicability.