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首页> 外文会议>IAF Space Propulsion Symposium;International Astronautical Congress >NUMERICAL SIMULATION OF TURBULENT FLOW AND COMBUSION IN RAMJET CHAMBER WITH NON-UNIFORM INFLOW
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NUMERICAL SIMULATION OF TURBULENT FLOW AND COMBUSION IN RAMJET CHAMBER WITH NON-UNIFORM INFLOW

机译：非均匀流入湍流流量和燃烧燃烧的数值模拟

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摘要

With the development of integral ramjet engine, many kinds of lateral air inlets have been widely used for higher performance and integration. Simultaneously, the non-uniform inlet outflow puts forward new demands and challenges for combustion chamber design. The simulation of the whole ramjet internal flow is computing resource intensive and simulation period long. In this paper, a CFD (Computational Fluid Dynamics) method combining steady and transient simulations is used to study the ramjet chamber flow and combustion situation with "real" inflow condition. A bluff-body stabilized chamber connected w ith chin inlet is studied. The non-uniform chamber inlet boundary condition is obtained from steady-state simulation of the whole internal flow. The chamber transient flow fields with non-uniform and equivalent uniform inflow conditions are simulated respectively. The influence of inflow uniformity is estimated. The results show that the non-uniform inflow leads to complex upstream and wake flow of flame holder, resulting in low combustion efficiency. The bluff-body flame holder is capable of reducing the inhomogeneity of downstream flow field, having a positive impact of combustion organization.
机译：随着整体式拉姆喷射发动机的发展，许多类型的横向空气入口被广泛用于更高的性能和集成。同时，非均匀的入口外流对燃烧室设计提出了新的需求和挑战。整个Ramjet内流的仿真是计算资源密集型和仿真期间。本文采用稳态和瞬态仿真组合的CFD（计算流体动力学）方法研究了“真正”流入条件的拉姆喷射室流动和燃烧情况。研究了诈唬体稳定室连接的With下巴入口。从整个内部流的稳态模拟获得不均匀的腔室入口边界条件。分别模拟具有非均匀和等效均匀流入条件的腔室瞬态流动场。估计流入均匀性的影响。结果表明，非均匀的流入导致燃烧器的复杂上游和唤醒流动，导致低燃烧效率。诈唬体火焰保持器能够降低下游流场的不均匀性，具有燃烧组织的积极影响。

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