作者设计了 4种主流倾斜的引射器模型 ,分别在 5种主气流倾斜角和 4种排气反压下 ,完成了模型冷流试验。试验表明 ,4种模型中具有等直管的模型 3,4引射系数普遍高于大头模型 1 ,2。在零气流角和反压为大气压时 ,约高 1 0 %左右 ,最高引射系数为 3.379。试验还表明 ,具有等直管的模型 3和模型 4能承受的反压较大。引射系数 N为零的反压可高至 90 0 mm水柱左右。 4种引射器模型中 ,模型 4的综合性能最好 The authors designed four models of predominantly inclined ejector models. The model cold flow tests were completed at five main airflow obliquities and four exhaust backpressures respectively. Experiments show that the model 4 and 4 models with straight tubes have generally higher ejection coefficients than the bulk model 1, 2. At zero air flow angle and back pressure at atmospheric pressure, about 10% higher, the maximum coefficient of 3.379. Experiments also show that model 3 and model 4 with straight tubes can withstand greater back pressure. The counterpressure at which the index of ejection N is zero can be as high as 90 0 mm of water. Of the four ejector models, model 4 has the best overall performance