20.500.12556/RUL-127809 Optimization of a self-excited pulsed air-water jet nozzle based on the response surface methodology Optimizacija samozbujenega curka zrak-voda na osnovi metode odzivnih delcev A self-excited pulsed air-water jet (SEPAWJ) offers many advantages over other jets and has a large number of practical and industrial applications. In order to take better advantage of the SEPAWJ, response surface methodology (RSM) models were established with the experimental impact force characteristics as the dependent variable and three key nozzle parameters as the independent variable. Single and coupling factor effects of these three parameters (oscillation chamber length, oscillation chamber height, and diameter of the downstream nozzle) on performance of nozzle are analysed, and the structural parameters of optimum performance are calculated using RSM models. The external flow field, impact force and cleaning performance of SEPAWJ before and after optimization are analysed and compared experimentally. It is found that the significance levels of established average impact force and impact force amplitude RSM models are lower than 0.05, and their error ratios between calculation and experiment under the optimum construction are both less than 5 %, which confirms their considerable reliability. Meanwhile, the final large water mass of optimized SEPAWJ is formed much earlier, and is more intensive and more concentrated. Compared with the original SEPAWJ nozzle, the impact force and impact force amplitude of optimized SEPAWJ nozzle are increased by 52.00 % and 38.26 %, respectively. In addition, the cleaned area ratio of nozzle before and after optimization is 76 % and 100 % at 50 seconds, respectively, with an increase of 22.4 %. multiphase flow impact force cleaning performance optimization pulsed jet večfazni tok udarna sila curek učinek čiščenja optimizacija metoda odzivnih ploskev true false false Angleški jezik Slovenski jezik Članek v reviji 2021-06-23 11:12:34 2021-06-23 11:12:41 2022-09-06 03:53:14 0000-00-00 00:00:00 2021 0 0 Str. 75-87 no. 3 Vol. 67 Mar. 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 532.5:519.61(045) 0039-2480 10.5545/sv-jme.2020.6995 58616323 RAZ_Wang_Yong_2021.pdf RAZ_Wang_Yong_2021.pdf 1 9F706ACC094D58BFC4234AB144F16F73 49736a57f78fb2483500be5e3e6c5131c08e2bfa3c72d5f1940bbbe5d2901b50 fea51646-d406-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=144352 https://www.sv-jme.eu/sl/article/experimental-study-on-self-excited-pulsed-air-water-jet/ 1 0ebb7c34-d403-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=144350 Fakulteta za strojništvo Strojniški vestnik 0 0 0