Effect of Structural Parameters on the Combustion Performance of Platelet Engines

2017 International Conference on Environmental, Industrial and Energy Engineering

生态环境科学;工业技术;能源学

Liang, Yin^1 ; Liu, Weiqiang^1

Science and Technology on Scramjet Laboratory, National University of Defense Technology, Changsha, Hunan

410073, China^1

关键词: Combustion characteristics;    Combustion efficiencies;    Combustion performance;    Maximum temperature;    Minimum temperatures;    Recirculation zones;    Structural parameter;    Temperature contours;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/104/1/012002/pdf
DOI  :  10.1088/1755-1315/104/1/012002

来源: IOP

【 摘 要 】

Numerical simulation was adopted to determine its flow and combustion characteristics by using gaseous methane and oxygen as the main propellants, the effects of nozzle space and expanding angle are examined for the single element splash platelet injector. Navier-Stokes (N-S) equations were solved for the gas-gas flow field with a reduced mechanism involving 9 species and 1 reaction. Results indicated that large corner recirculation zones are produced in the combustor head. This phenomenon consequently enhances mixing and stabilizes combustion, but non-uniformity in temperature contour is observed in the combustor head. Recirculation zone decreases as nozzle space increases, which induces the decrease of maximum temperature and high temperature regions, but it has little influence on the combustion efficiency and combustion length. The combustion length and maximum temperature decrease initially and then increase as expanding angle increases. Conversely, a D value of 2.4 mm and γ value of 60° are selected for the future works because of the shortest combustion length and minimum temperature of the injector faceplate.