| Citation: | ZHANG Qiufeng, HE Xiaomin, GONG Cheng, et al. Performance of swirling-flow single trapped vortex combustor under different swirler schemes[J]. Journal of Aerospace Power, 2023, 38（7）：1773-1783 doi: 10.13224/j.cnki.jasp.20210617
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To investigate the combustion performance of swirling-flow single trapped vortex combustor, three swirler schemes (baseline type, small flow area and additional flare) were designed and thermal tests were carried out at an inlet temperature of 493 K and at atmospheric pressure, using RP-3 aviation kerosene as fuel and a cavity equivalent ratio between 0.8 and 1.8. Results showed that the flame in the main combustion zone of the baseline and small flow area schemes was a deconfined flame, while that of the plus flare scheme was a V-shaped standing flame, and the flame in the main combustion zone of the small flow area and plus flare schemes was more concentrated. In terms of combustion efficiency, the base type scheme was the lowest while the small flow area scheme was the highest, and the highest combustion efficiency obtained in the test was 96.3%. The combustion efficiency of the baseline model increased with the increase of the cavity equivalent ratio, while that of the small flow area solution remained basically the same at first and then increased slightly, and that of the plus flare solution increased rapidly and then slowly. The total pressure loss of the small circulation area scheme was higher than that of the baseline type, which was 7.2% and 4.5% respectively, at an inlet Mach number of 0.31.
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