Cavitation in Centrifugal Pumps With Liquids Other Than Water

1961 ◽  
Vol 83 (1) ◽  
pp. 79-89 ◽  
Author(s):  
A. J. Stepanoff
Keyword(s):  
Test Data ◽  
Hot Water ◽  
Centrifugal Pumps ◽  
Specific Speed

Conditions leading to cavitation of liquids other than water are examined. The concept of the thermal cavitation criterion is considered in view of new test data on hot water and other liquids, and its utility for determination of NPSH corrections is demonstrated. The effect of the suction specific speed on the NPSH corrections is tentatively established.

scholarly journals Optimal Design of Slit Impeller for Low Specific Speed Centrifugal Pump Based on Orthogonal Test

2021 ◽  
Vol 9 (2) ◽  
pp. 121
Author(s):  
Yang Yang ◽  
Ling Zhou ◽  
Hongtao Zhou ◽  
Wanning Lv ◽  
Jian Wang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Centrifugal Pump ◽  
Large Scale ◽  
Internal Flow ◽  
Orthogonal Test ◽  
Centrifugal Pumps ◽  
Initial Model ◽  
Low Specific Speed ◽  
Specific Speed ◽  
Four Levels

Marine centrifugal pumps are mostly used on board ship, for transferring liquid from one point to another. Based on the combination of orthogonal testing and numerical simulation, this paper optimizes the structure of a drainage trough for a typical low-specific speed centrifugal pump, determines the priority of the various geometric factors of the drainage trough on the pump performance, and obtains the optimal impeller drainage trough scheme. The influence of drainage tank structure on the internal flow of a low-specific speed centrifugal pump is also analyzed. First, based on the experimental validation of the initial model, it is determined that the numerical simulation method used in this paper is highly accurate in predicting the performance of low-specific speed centrifugal pumps. Secondly, based on the three factors and four levels of the impeller drainage trough in the orthogonal test, the orthogonal test plan is determined and the orthogonal test results are analyzed. This work found that slit diameter and slit width have a large impact on the performance of low-specific speed centrifugal pumps, while long and short vane lap lengths have less impact. Finally, we compared the internal flow distribution between the initial model and the optimized model, and found that the slit structure could effectively reduce the pressure difference between the suction side and the pressure side of the blade. By weakening the large-scale vortex in the flow path and reducing the hydraulic losses, the drainage trough impellers obtained based on orthogonal tests can significantly improve the hydraulic efficiency of low-specific speed centrifugal pumps.

Determination of Fracture Toughness and K-R Curve for 2524-T3 Aluminum Alloy

2011 ◽  
Vol 291-294 ◽  
pp. 1039-1042
Author(s):  
Wei Xie ◽  
Shao Wei Tu ◽  
Qi Qing Huang ◽  
Ya Zhi Li
Keyword(s):  
Fracture Toughness ◽  
Aluminum Alloy ◽  
Stress Fracture ◽  
Test Data ◽  
Plane Stress ◽  
Crack Extension ◽  
Room Temperature ◽  
Mode I ◽  
Average Value

In the present work, the resistance to crack extension of 2524-T3 aluminum alloy under Mode I loading was studied by using the middle-cracked tension M (T) specimens. The curve, plane-stress fracture toughness and apparent plane-stress fracture toughness were calculated by test data. The average value of measured fracture toughness at room temperature was 161 MPam1/2. The results and conclusions can be referred in airplane skin design.

Determination of Spot Weld Modeling Parameters from Test Data for Finite Element Crash Simulation

2004 ◽  
Author(s):  
Chelliah Madasamy ◽  
Tau Tyan ◽  
Omar Faruque ◽  
Thierry Guimberteau
Keyword(s):  
Finite Element ◽  
Test Data ◽  
Spot Weld ◽  
Crash Simulation

Prediction of Pump Performance Under Air-Water Two-Phase Flow Based on a Bubbly Flow Model

1993 ◽  
Vol 115 (4) ◽  
pp. 781-783 ◽  
Author(s):  
Kiyoshi Minemura ◽  
Tomomi Uchiyama
Keyword(s):  
Two Phase Flow ◽  
Bubbly Flow ◽  
Phase Flow ◽  
Centrifugal Pumps ◽  
Flow Conditions ◽  
Two Phase ◽  
Performance Change ◽  
Void Fractions ◽  
Two Phases

This paper is concerned with the determination of the performance change in centrifugal pumps operating under two-phase flow conditions using the velocities and void fractions calculated under the assumption of an inviscid bubbly flow with slippage between the two phases. The estimated changes in the theoretical head are confirmed with experiments within the range of bubbly flow regime.

Cavitation Properties of Liquids

1964 ◽  
Vol 86 (2) ◽  
pp. 195-199 ◽  
Author(s):  
A. J. Stepanoff
Keyword(s):  
Thermal Properties ◽  
Molten Metal ◽  
Test Data ◽  
Centrifugal Pumps ◽  
Cavitation Behavior ◽  
Sufficient Test

A method of representing the thermal properties of liquids is offered such that cavitation behavior of centrifugal pumps handling any liquid—molten metal, hydrocarbons, cryogenics—can be accurately evaluated. Sufficient test data are available to illustrate the use of the method. The paper is a supplement to the article published earlier [1] by the author.

scholarly journals Determination Of Thermal Parameters Of Solar Water Heating Collectors Using The “Dark” Testing Method

2020 ◽  
Vol 02 (11) ◽  
pp. 62-67
Author(s):  
Nizomjon Orifovich Usmonov ◽  
◽  
Xayrulla Sunnatullaevich Isakhojaev ◽  
Saodat Rakhsulaevna Akhmatova ◽  
Feruza Abdullaevna Khoshimova ◽  
...  
Keyword(s):  
Thermal Characteristics ◽  
Hot Water ◽  
Thermal Testing ◽  
Water Heating ◽  
Solar Water Heating ◽  
Solar Water ◽  
Testing Method ◽  
Hot Water Supply ◽  
Hot Water Supply System

In the production of flat solar water heating collectors, thermal testing occupies a special place, the purpose of which is to determine their thermal characteristics experimentally. The corresponding approximation expressions are proposed for determining the coefficient of heat loss, inclined to the horizon at an angle of 300 for the average conditions of their operation in the hot water supply system

scholarly journals DETERMINATION OF THE AGR-1 CAPSULE TO FPMS SPECTROMETER TRANSPORT VOLUMES FROM LEADOUT FLOW TEST DATA

2007 ◽  
Author(s):  
J. K. Hartwell ◽  
J. B. Walter ◽  
D. M. Scates ◽  
M. W. Drigert
Keyword(s):  
Test Data ◽  
Flow Test
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