论文部分内容阅读
为探索适用于高推重比发动机的高性能燃烧室,在一种冲压发动机特定结构应用背景条件下,设计了一种驻涡燃烧室(Trapped-Vortex Combustor,简称TVC)技术应用模型方案,并对其进行了冷态流场数值模拟,对包括驻涡区长宽比、驻涡区长度、驻涡区进口导流结构形式、主流钝体与联焰板的结构形式与参数的影响进行了分析,探索TVC燃烧室方案在冲压发动机上的应用可行性。从三维冷态流场数值模拟结果来看,燃烧室模型方案内部形成了设计的涡系结构,能够实现初步的组织燃烧。通过不同设计参数的计算模拟,摸索出驻涡区高度、驻涡区宽高比等参数对燃烧室内部流场影响的规律。研究结果表明驻涡区宽高比控制在1.0左右驻涡区涡系结构最好,有利于组织燃烧。
In order to explore a high-performance combustion chamber suitable for high thrust-to-weight ratio engines, a model scheme of Trapped-Vortex Combustor (TVC) technology was designed under the background of a specific structure of ramjet engine. The numerical simulation of the cold flow field is carried out. The influences of the aspect ratio of the vortex area, the length of the vortex chamber, the inlet guide structure in the vortex zone, the structure and parameters of the mainstream bluff body and the joint flame plate are analyzed , To explore TVC combustion chamber program in the stamping engine application feasibility. From the numerical simulation results of three-dimensional cold flow field, the designed vortex structure is formed inside the combustion chamber model scheme, which can achieve the initial organization combustion. Through the calculation and simulation of different design parameters, the influence of the parameters such as the height of the vortex in the vortex and the aspect ratio of the vortex in the combustion chamber on the flow field inside the combustion chamber was studied. The results show that the eddy vortex aspect ratio control in the vortical eddy vortex system around 1.0 is the best, is conducive to tissue combustion.