Author(s): LIU Qian, ZHENG Hong-tao, LI Zhi-ming, CHEN Xi, College of Power and Energy Engineering, Harbin Engineering University
Pages: 1328-1336
Year: 2015 Issue:  6
Journal: Journal of Aerospace Power
Keyword:  gas turbine; continuously rotating detonation combustor(CRDC); fuel inflow total pressure; detonation wave number; pressure ratio;
Abstract: Using two-dimensional compressible Euler equations,the flow field in continuously rotating detonation combustor(CRDC)with equivalent hydrogen/air was numerically analyzed.The effects of fuel inflow total pressure at different azimuthal sizes of CRDC on pressure ratio,combustion efficiency,volume heat release rate and NOx emissions were examined.The results show that with the increase of fuel inflow total pressure,when azimuthal size of CRDC is 150 mm,pressure ratio remains unchanged,and combustion efficiency and volume heat release rate grow linearly;when azimuthal size of CRDC is 250 mm,detonation wave number redoubles,and volume heat release rate still grow linearly,but pressure ratio and combustion efficiency turn down due to the increase of fuel inflow total pressure.Compared with conventional isobaric combustor,CRDC has a higher performance.In the calculation region of 250mm×40mm,the pressure ratio goes up to 2.706,greatly improving the potential power of gas;volume heat release rate is 2.18 ×1010 W/m3;NOx emissions is0.692mg/m3,thereby ensuring low emissions requirements.