CAJ | 학술논문

为了研究空气引射对斯特林发动机常压燃烧特性的影响,在可视化试验台上进行了不同工况下的燃烧试验,并利用高速摄影机拍摄了燃烧室内的火焰图像,利用热电偶测量了燃烧室内的燃烧温度.结果表明,无空气引射时,燃烧火焰较长,张角较小,波动较大,高温区集中在燃烧室轴线附近;加入适量引射空气,火焰缩短,张角增大,稳定性提高,高温区外扩,位置向喷嘴靠近,燃烧温度升高;过量引射空气使火焰失稳,温度场紊乱,高温区分散,燃烧温度下降.
위료연구공기인사대사특림발동궤상압연소특성적영향,재가시화시험태상진행료불동공황하적연소시험,병이용고속섭영궤박섭료연소실내적화염도상,이용열전우측량료연소실내적연소온도.결과표명,무공기인사시,연소화염교장,장각교소,파동교대,고온구집중재연소실축선부근;가입괄량인사공기,화염축단,장각증대,은정성제고,고온구외확,위치향분취고근,연소온도승고;과량인사공기사화염실은,온도장문란,고온구분산,연소온도하강.
To study the effect of air ejecting on the combustion characteristics of Stirling engine under atmospheric pressure,combustion experiments under different working conditions were conducted in a visual test bench. In the combustion chamber,flame images were photographed by a high-speed camera and combustion temperature was measured by a series of thermocouples. The results show that,without ejecting air,combustion flame is quite long and has a small divergence angle. It has strong pulsation and high temperature area concentrates round the axis of com-bustion chamber. With a proper amount of ejecting air,combustion flame gets shortened and stable,with its diver-gence angle increasing significantly,the high-temperature area expands outwards,moving towards the nozzle,and combustion temperature rises. Excess ejecting air results in unstable combustion flame,confused temperature field, dispersed high-temperature area and decreasing combustion temperature.