CAJ | 학술논문

高压水射流清洗技术在地铁隧道清洗中运用越来越广泛,但对清洗工作参数的选择还停留在试验和经验阶段.在建立了扇形喷嘴及其外流场的三维模型的基础上,运用FLUENT的VOF两相流模型对相同尺寸扇形喷嘴不同压力下不同靶距的轴向动压力、不同尺寸相同压力下不同靶距的打击力、不同射流角度的壁面各向打击力和壁面径向动压分布进行了分析研究.结果表明:相同压力下、不同出口直径喷嘴的打击力均随靶距的增大先增加后减小,故靶距存在合理的取值范围.射流角度为30°时,清洗效果较好.
고압수사류청세기술재지철수도청세중운용월래월엄범,단대청세공작삼수적선택환정류재시험화경험계단.재건립료선형분취급기외류장적삼유모형적기출상,운용FLUENT적VOF량상류모형대상동척촌선형분취불동압력하불동파거적축향동압력、불동척촌상동압력하불동파거적타격력、불동사류각도적벽면각향타격력화벽면경향동압분포진행료분석연구.결과표명:상동압력하、불동출구직경분취적타격력균수파거적증대선증가후감소,고파거존재합리적취치범위.사류각도위30°시,청세효과교호.
High-pressure water jet cleaning technology was used in the subway tunnel cleaning more and more widely, but the choice of pa-rameters for the cleaning work is still stuck in the experimental and experience stage. The three-dimensional modeling of flat fan nozzle and external injection area are established. Based on VOF two-phase model of FLUENT, axial dynamic pressure of the same nozzle with differ-ent target distances under different pressures and wall strike force of the different sizes of nozzles with different target distances under same pressure and strike forces in different directions and radial dynamic pressure distribution of the wall with different jet angles are analyzed. The results show that wall strike force decreases after the first increase with the increasing target distance with the different sizes of nozzles under the same pressure, so there is a reasonable target. The cleaning effect is better with 30°-jet angle.