نوع مقاله : مقاله پژوهشی
نویسندگان
1 تبدیل انرژی، دانشکده مهندسی مکانیک، دانشگاه علم و صنعت ایران، تهران، ایران
2 گروه هوا فضا، دانشکده مهندسی مکانیک، دانشگاه علم و صنعت ایران، تهران، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In the Hartmann-Sprenger tube, consisting of a converging nozzle and a closed-end tube, by establishing the under-expanded flow through the converging nozzle and entering it in the tube, during a fluid process, significant heating is created and the gas temperature at the end of the tube strongly goes up. In the current research, the effect of leakage at the end of the tube on its heating performance was investigated by constructing an experimental test set and selecting specific parameters. The effect of three independent parameters in this tube, including the gas pressure upstream of the nozzle, the distance between the nozzle and the tube, and the diameter of the hole at the end of the tube have been studied. For a specific value of the tube diameter, two intervals of 3 and 5 times for the nozzle diameter, three pressure values of 5, 6, and 8 bar, and seven different values for the hole diameter were selected as the range of independent variables. The results show that a hole at the end of the tube will reduce the maximum temperature that can be achieved. In addition, as the pressure increases, the temperature will increase in the case of resonance conditions. It has also been shown that a hole at the end of the tube does not affect the characteristics of the diffused sound. This phenomenon can use in natural gas pressure reduction stations.
کلیدواژهها [English]
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