连续旋转爆轰燃烧室的性能  

Performance of continuously rotating detonation combustor

作　　者：刘倩[1] 郑洪涛[1] 李智明[1] 陈曦[1] 

机构地区：[1]哈尔滨工程大学动力与能源工程学院,哈尔滨150001

出　　处：《航空动力学报》2015年第6期1328-1336,共9页Journal of Aerospace Power

摘　　要：利用二维可压缩欧拉方程数值研究了当量氢气/空气在连续旋转爆轰燃烧室(CRDC)中的流场情况,主要考查了不同CRDC周向尺寸下燃料入流总压对增压比、燃烧效率、容积热负荷及其NOx排放等性能的影响.结果表明:当CRDC周向尺寸为150mm时,随着燃料入流总压的提高,增压比基本保持不变,燃烧效率和容积热负荷均呈线性增长;当CRDC周向尺寸为250mm时,随燃料入流总压的提高,爆轰波头数加倍,容积热负荷仍呈线性增长,但是增压比及燃烧效率均出现转折性下降.与传统的等压燃烧室相比,CRDC具有更高的性能.当计算域为250mm×40mm时,增压比高达2.706,大大提高了燃气的做功能力;容积热负荷达到2.18×1010 W/m3;而NOx排放质量浓度为0.692mg/m3,保证了低排放的要求.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.

关 键 词：燃气轮机 连续旋转爆轰燃烧室 燃料入流总压 爆轰波头数 增压比 

分 类 号：V231[航空宇航科学与技术—航空宇航推进理论与工程] O381[理学—流体力学]