【摘要】 提出了一种基于压力修正的动态可压缩小火焰/反应进程变量(CFPV)燃烧模型。通过分别对低马赫数和高马赫数飞行工况条件下两级燃料喷注的凹腔超燃冲压发动机燃烧室进行雷诺时均模拟，基于详细化学反应建表的CFPV模型在不同工况条件下的预测结果均与实验测量结果相吻合。一方面，与原始未修正的FPV模型相比，考虑可压缩修正的CPFV模型预测精度显著提高。另一方面，与传统有限速率类的部分搅拌反应器(PaSR)模型相比，即使在使用总包机理的情况下，基于详细化学反应机理的CFPV模型也具备了高出近5倍的求解速率。此外，超燃冲压发动机燃烧室的初级燃烧区域在低马赫数条件下呈现双模态燃烧，在高马赫数条件下呈现超燃模态燃烧，而次级燃烧区域则在不同飞行马赫数工况下均呈现双模态燃烧。更多还原

【Abstract】 A pressure-corrected dynamic compressible flamelet/progress variable(CFPV) combustion model is proposed. Reynolds-averaged Navier-Stokes simulations were conducted for a cavity-stabilized scramjet combustor with two-stage fuel injection under both low-Mach and high-Mach flight conditions. The predictions of the tabulated CFPV model, based on detailed chemical kinetic mechanism, demonstrated excellent agreement with experimental measurements across all operating conditions. On one hand, compared to the original uncorrected FPV model, the compressibility-corrected CFPV model significantly improved prediction accuracy. On the other hand, even when using a global mechanism, the CFPV model based on detailed chemistry achieved nearly five times higher computational efficiency than the traditional finite-rate partially stirred reactor(PaSR) model. Furthermore, the primary combustion zone of the scramjet combustor exhibits dual-mode combustion under low-Mach conditions and supersonic combustion under high-Mach conditions, while the secondary combustion zone maintains dual-mode combustion across all flight Mach numbers.更多还原