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快速高效的准一维计算是超燃冲压发动机设计的重要研究方法。该文发展建立了适用于气态或液态燃料、包含隔离段结构、跨声速工况的准一维通用计算模型。该模型以Euler方程组作为基本控制方程,综合考虑了燃烧室截面面积变化、液态燃料蒸发相变、燃料质量添加、摩擦力项以及隔离段内斜激波串结构对流动的影响等因素。依次以NAL氢燃料发动机实验、气态煤油燃料发动机实验和液态煤油燃料发动机实验等3个不同燃料实验作为验证算例对模型进行考核,计算结果与实验数据均吻合良好,验证了模型的有效性和准确性。该模型可进一步应用于各类燃料的超燃冲压发动机燃烧室结构及工作参数的设计与优化等研究工作。
Fast and efficient quasi-one-dimensional calculation of scramjet engine design is an important research method. In this paper, a quasi-one-dimensional generalized calculation model suitable for gaseous or liquid fuels, including isolated segment structure and transonic conditions is developed. The Euler equation is taken as the basic control equation. The model takes into account factors such as the change of cross-sectional area of the combustion chamber, the phase transition of liquid fuel evaporation, the fuel mass addition, the friction force and the skewed flow skew structure in the isolation section. Three different fuel experiments, such as NAL hydrogen fuel engine test, gaseous kerosene fuel engine test and liquid kerosene fuel engine test, were taken as verification examples to verify the model. The calculated results are in good agreement with the experimental data and the validity of the model is verified accuracy. The model can be further applied to various types of fuel scramjet engine combustion chamber structure and working parameters of the design and optimization of research work.