Experimental and numerical investigation of dual bell nozzle flow under realistic flight conditions (K02*)

真实飞行条件下双钟罩喷嘴流动的实验和数值研究（K02*）

• 批准号: 317890697
• 金额: --
• 依托单位: Deutsches Zentrum für Luft- und Raumfahrt (DLR)
• 依托单位国家: 德国
• 项目类别: CRC/Transregios
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/317890697?language=en
• 关键词: Experimental; numerical; investigation; dual; bell

The first funding phases focused on the understanding and predicting of flow phenomena in dual bell noz-zles, first on a fundamental level, then on hot flow combustion and CFD level. For qualification as main stage engine nozzle, the dual bell must be studied under realistic flight conditions. Therefore, cold flow investigations on ambient air pressure fluctuations and contour ovalization effect on transitional behaviour will be conducted and a technology demonstration on hot flow tests of C/C-SiC nozzle realized. Based on the gained insight, contour optimization and flight trajectory calculation will be conducted for future potential Ariane configurations.

第一个资助阶段的重点是理解和预测双钟形喷嘴中的流动现象，首先是在基本水平上，然后是在热流燃烧和计算流体动力学水平上。为了使双钟形喷管能够作为主级发动机喷管，必须在实际飞行条件下对其进行研究。为此，将开展环境气压波动的冷态流动研究和轮廓椭圆化对过渡特性的影响，并实现C/C-SiC喷管热态流动试验的技术论证。基于所获得的洞察力，将对未来潜在的阿丽亚娜构型进行外形优化和飞行轨迹计算。