Experimental study on the outlet temperature distribution of double swirler combustor
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摘要:
以双旋流全环燃烧室为试验对象,分别在高温高压、高温中压和发动机整机条件下开展试验研究。分别设计了带有环腔引气和模拟型喷嘴等模拟发动机边界条件的试验方案,并分析不同试验条件下的出口温度分布规律。试验结果表明:中、高压试验条件下的出口温度分布规律基本一致,热点区域基本一致;中压试验周向出口温度分布水平明显优于高压试验;高压试验温度分布曲线呈中心波峰形式,而中压试验中心波峰形式不明显。设计的高压试验出口温度分布规律和数值更接近发动机整机测试结果,设计的中压试验出口温度分布数值与高压试验相比存在一个比例系数,系数为1.3~1.4。
Abstract:The double swirler full annual combustor was taken as the experiment object, the outlet temperature distribution under different experiment conditions was compared and analyzed under high temperature/high pressure, high temperature/medium pressure and engine experiment conditions. The experimental schemes with annular bleed and simulated nozzle were designed to simulate the boundary conditions of the engine, and the outlet temperature distribution under different experimental conditions was analyzed. The experimental results showed that the outlet temperature distribution under the medium and high pressure experimental conditions was basically the same, and the hot spot area was basically the same; the outlet temperature distribution level of the middle pressure experiment was obviously better than that of the high- pressure experiment; the temperature distribution curve of high-pressure experiment was in the form of central peak, while that of medium pressure experiment was not obvious. The designed high-pressure experiment outlet temperature distribution law and value were closer to the engine experiment results; compared with the high-pressure experiment, the outlet temperature distribution value of the medium pressure experiment designed regularly had a proportional coefficient of 1.3—1.4.
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表 1 主要测点误差
Table 1. Main measurement accuracy
测量参数 测量范围 测量误差/% 进口温度/℃ 0~1000 0.5 进口压力/MPa 0~5 0.1 进口空气流量/(kg/s) 10~100 1.5 外环引气量/(kg/s) 1~8 1 内环引气量/(kg/s) 1~8 1 出口温度/℃ 0~1800 0.5 燃油流量/(kg/s) 0.2~3 0.5 环境压力/kPa 95~105 0.4 表 2 试验相对误差
Table 2. Experimental relative deviation
试验状态 试验数据 Δ(δ0) δ(δ0)/% 1 1-1 ±0.010 ±4.2 1-2 ±0.010 ±4.1 2 2-1 ±0.010 ±4.4 2-2 ±0.010 ±4.0 3 3-1 ±0.010 ±3.9 3-2 ±0.010 ±4.0 4 4-1 ±0.010 ±3.9 4-2 ±0.010 ±4.1 表 3 发动机试验条件下的出口温度分布值
Table 3. Outlet temperature distribution value of the engine experiment
试验状态 (t4−t3)/℃ δ0 N2r/% 1 510 0.893a 66.01 2 579 0.333a 81.52 3 818 0.263a 91.54 4 910 0.260a 95.83 5 931 0.255a 96.9 6 939 0.247a 97.13 7 941 0.248a 97.13 8 939 0.260a 97.26 9 939 0.247a 97.21 10 939 0.257a 97.25 表 4 不同测试条件下的出口温度分布值
Table 4. Outlet temperature distribution value of different testers
出口温度分布值 中压试验 高压试验 整机试验 δ0 0.22b 0.30b 0.29b σt4ave 25 44 36 σt4max 37 58 44 -
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