Relaxation Calculation Method and Analysis of Jet-Buffer Mechanism in Water Hammer with Liquid Column Separation

doi:10.12141/j.issn.1000-565X.200674

	Relaxation Calculation Method and Analysis of Jet-Buffer Mechanism in Water Hammer with Liquid Column Separation
	Fu, You; Niu, Xuetian; Min, Zheng
	2021-07-01
发表期刊	Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science)
ISSN	1000565X
卷号	49 期号:7 页码:134-141
摘要	A multiphase relaxation calculation method with the adaptive process was established to analyze jet-buffer mechanism in water hammer with liquid column separation. The rationality and stability of this calculation method were verified by air-water two-phase shock tube. The internal flow mechanism of water hammer with liquid column separation was analyzed. The results show that for water hammer with liquid column separation whose secondary pressure variation value is higher than the theoretical ones, it can be divided into the direct water hammer, the buffer water hammer, and the jet water hammer. In the stage of buffer water hammer, the presence of bubbles reduces the pressure impact on the boundary, causing the water hammer wave appear buffered and the change of pressure value is smaller than the theoretical ones. In the stage of jet water hammer, the jet acceleration generated during void compression and collapse does not directly affect the pressure impact on the boundary, but it causes a secondary pressure change accumulation in the initial value after back propagation, and the change value is higher than the theoretical calculation value. The occurrence of jet water hammer affects the accuracy of value calculated by direct water hammer method, so this is the most noteworthy part of water hammer with column separation calculation. © 2021, Editorial Department, Journal of South China University of Technology. All right reserved.
关键词	Air Backpropagation Liquids Shock tubes Adaptive process Column separation Liquid columns Pressure change Pressure impact Pressure values Pressure variations Theoretical calculations
DOI	10.12141/j.issn.1000-565X.200674
收录类别	EI
语种	中文
出版者	South China University of Technology
EI入藏号	20213110716983
EI主题词	Water hammer
EI分类号	632.2 Hydraulic Equipment and Machinery ; 723.4 Artificial Intelligence ; 804 Chemical Products Generally
引用统计	无
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/150741
专题	能源与动力工程学院
作者单位	College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
第一作者单位	能源与动力工程学院
第一作者的第一单位	能源与动力工程学院
推荐引用方式 GB/T 7714	Fu, You,Niu, Xuetian,Min, Zheng. Relaxation Calculation Method and Analysis of Jet-Buffer Mechanism in Water Hammer with Liquid Column Separation[J]. Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science),2021,49(7):134-141.
APA	Fu, You,Niu, Xuetian,&Min, Zheng.(2021).Relaxation Calculation Method and Analysis of Jet-Buffer Mechanism in Water Hammer with Liquid Column Separation.Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science),49(7),134-141.
MLA	Fu, You,et al."Relaxation Calculation Method and Analysis of Jet-Buffer Mechanism in Water Hammer with Liquid Column Separation".Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) 49.7(2021):134-141.