GOALI: Internal Shocks and Acoustic Emissions in Gas Particle Flows

GOALI：气体颗粒流中的内部冲击和声发射

• 批准号: 9812837
• 负责人: Awatef Hamed
• 金额: --
• 依托单位: University of Cincinnati Main Campus
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-03-01 至 2003-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9812837&HistoricalAwards=false
• 关键词: GOALI; Internal; Shocks; Acoustic; Emissions

The objective is to improve understanding and develop numerical simulation of shock structure in gas-particle supersonic jet flows, and the interactions with boundary layer of the flow and acoustic field. The particle presence changes the flow structure of a shock wave, the onset of flow separation and acoustic emissions as compared to single fluid flow. A combined experimental and computational investigation will be undertaken, including design improvement for supersonic jet nozzles. Pressure fluctuations will be measured in a particle-laden jet in a variety of configurations. The simulations will be based on Lagrangian description of the particle motion and large eddy simulation of the mixture. This is a GOALI project in collaboration between the University of Cincinnati Propulsion Laboratory and Cold Jet Incorporated. The proposed research has relevance to various propulsion systems, combustion, jet cleaning and cutting, as well as to the general development of understanding of two-phase supersonic compressible flows.

目的是提高对气体超音速射流中冲击结构的理解和发展数值模拟，以及与流量和声场边界层的相互作用。 与单流体流相比，粒子的存在改变了冲击波的流量结构，流动分离的发作和声学发射。 将进行合并的实验和计算调查，包括超音速喷嘴的设计改进。 压力波动将以各种构型的颗粒射流进行测量。 模拟将基于对混合物的颗粒运动和大型涡流模拟的拉格朗日描述。 这是辛辛那提大学推进实验室与冷喷气机公司之间合作的目标项目。 拟议的研究与各种推进系统，燃烧，喷气清洁和切割以及对两相超音速压缩流的理解的一般发展相关。