中南大学学报（自然科学版）2018，Vol.49Issue(2)：282-289,8.DOI:10.11817/j.issn.1672-7207.2018.02.004
不同伴随流条件下的集束射流流场特性
Coherent jet characteristics under different shrouding gas conditions
摘要
Abstract
The field characteristics of coherent jet and conventional supersonic jet was studied by numerical simulation and experiment under different shrouding gas parameter conditions. The results show that the temperature and pressure of the nozzle exit is affected by shrouding gas and it leads to velocity and temperature fluctuations of the supersonic jet. The low-density and high-speed environment produced by high temperature and high flow of the shrouding gas protects supersonic jet, and reduces radial expansion and axial velocity attenuation rate of the jet. The higher the temperature and flow are, the longer the velocity and temperature core length of the jet are. Compared with conventional supersonic jet, the distributions of half-jet width and vorticity are changed by shrouding gas. With the high temperature and flow of the shrouding gas, the turbulence intensity of the jet maintains at low level over a long distance.关键词
伴随流/超音速射流/流场特性Key words
shrouding gas/supersonic jet/flow field characteristics分类
矿业与冶金引用本文复制引用
赵飞,孙冬柏,朱荣,杨凌志..不同伴随流条件下的集束射流流场特性[J].中南大学学报（自然科学版）,2018,49(2):282-289,8.基金项目
国家重大科学仪器设备开发专项(2011YQ14014505) （2011YQ14014505）
中央高校基本科研业务费专项资金资助项目(FRF-AS-17-004) (Project(2011YQ14014505) supported by the National Key Scientific Instrument and Equipment Development Funds （FRF-AS-17-004）
Project (FRF-AS-17-004) supported by the Fundamental Research Funds for the Central Universities) （FRF-AS-17-004）
