scholarly journals Hydraulic performance prediction and optimization of an engine cooling water pump using computational fluid dynamic analysis

PLoS ONE ◽  
2021 ◽  
Vol 16 (6) ◽  
pp. e0253309
Author(s):  
Libin Tan ◽  
Yuejin Yuan ◽  
Man Zhang
Keyword(s):  
Computational Fluid Dynamic ◽  
Performance Prediction ◽  
Fluid Dynamic ◽  
Cooling Water ◽  
Hydraulic Performance ◽  
Pump Efficiency ◽  
Optimized Design ◽  
Water Pump ◽  
Engine Cooling ◽  
Pump Head

In current research, the hydraulic performance prediction and optimization of an engine cooling water pump was conducted by computational fluid dynamic (CFD) analysis. Through CFD simulation, the pump head, shaft power and efficiency for the original pump at volume flow rate 25 L/min and impeller rotating speed 4231 r/min were 3.87 m, 66.7 W and 23.09% respectively. For improving hydraulic performance, an optimization study was carried out. After optimization, four potential optimized designs were put forward. The efficiency of the optimized design No.1 for engine cooling water pump was nearly 6% higher than that of the original pump model; and the head of the optimized design No.2 for engine cooling water pump was 9% higher than that of the original pump model. Under the condition of maintaining the pump head and considering comprehensive improvement effect, the optimized design No.3 was considered as the best design and selected as the test case for validating the optimum design. The hydraulic performance predictions for this optimum engine cooling water pump agreed well with experimental data at design condition with relative discrepancies of 2.9% and 5.5% for the pump head and pump efficiency, respectively. It proved that performance prediction calculation model and the automatic optimization model were effective. This research work can provide theoretical basis for the design, development and optimization of engine cooling water pump.

Parametric Consideration of a Thermal Water Pump and Application for Agriculture

2015 ◽  
Vol 137 (3) ◽  
Author(s):  
Jirawat Sitranon ◽  
Charoenporn Lertsatitthanakorn ◽  
Pichai Namprakai ◽  
Naris Prathinthong ◽  
Taveewat Suparos ◽  
...  
Keyword(s):  
Thermal Water ◽  
Cooling Water ◽  
Check Valve ◽  
Working Fluid ◽  
Electric Heater ◽  
Feed Water ◽  
Vapor Flow ◽  
Pump Efficiency ◽  
Water Tank ◽  
Water Pump

This research studied the effects of suction heads on the efficiency of a thermal water pump with steam. In order to save energy, the authors also studied the appropriate amount of air added to a steam working fluid. Cooling time was attempted to be shorten, direct contact cooling was employed. The system comprised feed water tank (FT), liquid piston tank (LT), heat tank (HT), storage tank (ST), well tank (WT), and check valve (CV). It was directly cooled by cooling water. Thermal energy input was supplied by an electric heater as a substitute of heat sources such as firewood. An operation of the pump consisted of five stages: heating, pumping, vapor-flow, cooling, and suction. In conclusion, increasing the suction head raised the pumping efficiency until the maximum was achieved. Using air in conjunction with the steam working fluid could lower the working temperature suitable for solar application. In addition, the simulation of a thermal pump with steam was merely presented. A good agreement between the test and the model was found. The larger pump size was selected to be constructed and tested in order to increase the pump efficiency. Agricultural application of the larger pump could obtain energy source from waste of firewood at no cost.

Numerical calculation and optimization designs in engine cooling water pump

2017 ◽  
Vol 31 (5) ◽  
pp. 2319-2329 ◽  
Author(s):  
Li Wei ◽  
Chuan Wang ◽  
Weidong Shi ◽  
Xiaofan Zhao ◽  
Yongfei Yang ◽  
...  
Keyword(s):  
Numerical Calculation ◽  
Cooling Water ◽  
Water Pump ◽  
Engine Cooling

scholarly journals Numerical Simulation of Cavitation Performance in Engine Cooling Water Pump Based on a Corrected Cavitation Model

Processes ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 278 ◽  
Author(s):  
Wei Li ◽  
Enda Li ◽  
Weidong Shi ◽  
Weiqiang Li ◽  
Xiwei Xu
Keyword(s):  
Cooling Water ◽  
Internal Flow ◽  
Absolute Pressure ◽  
Inlet Section ◽  
Water Pump ◽  
Cavitation Model ◽  
Suction Surface ◽  
Pressure Surface ◽  
Engine Cooling ◽  
Cavitation Performance

To analyze the internal flow of the engine cooling water pump (ECWP) under thermodynamic effect, Zwart cavitation model based on the Rayleigh-Plesset equation is corrected, and NACA0015 hydrofoil was selected to verify the corrected model. The cavitation performances of ECWP with different temperatures were numerically simulated based on a corrected cavitation model. Research results show that simulation values of pressure distribution coefficient in hydrofoil surface at 70 °C are in closest agreement with experimental values when the evaporation and condensation coefficients are 10 and 0.002, respectively. With the decrease of absolute pressure in pump inlet, bubbles firstly occurred at the blade inlet side near the suction surface and then gradually extended to the pressure surface, finally clogged the impeller passage. Compared to the inlet section, the cavitation degree is much more serious close to the trailing edge. With the temperature increases, the cavitation in ECWP occurs in advance and rapidly, and the temperature plays an important role in promoting cavitation process in ECWP. Based on the unsteady simulation of ECWP, the influence of cavitation on the performance characteristics is studied. The results provide a theoretical reference for the prediction and optimization of the cavitation performance in ECWP.

scholarly journals Numerical Prediction and Performance Experiment in an Engine Cooling Water Pump with Different Blade Outlet Widths

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Wei Li ◽  
Xiaofan Zhao ◽  
Weiqiang Li ◽  
Weidong Shi ◽  
Leilei Ji ◽  
...  
Keyword(s):  
Flow Rate ◽  
High Efficiency ◽  
Static Pressure ◽  
Cooling Water ◽  
Internal Flow ◽  
Water Pump ◽  
Centrifugal Pumps ◽  
Suction Surface ◽  
Engine Cooling ◽  
Performance Curves

Changing the blade outlet width is an important method to adjust the performance curves of centrifugal pumps. In this study, three impellers with different blade outlet widths in an engine cooling water pump (ECWP) were numerically simulated based on ANSYS-CFX software. Numerical calculation reliability was validated based on the comparison between simulation results and experimental datum. As the blade outlet width increases, from the performance curves, the investigated ECWP head increases gradually; and the best efficiency point (BEP) offsets to larger flow rate; and the high efficiency region (HER) is becoming larger; and the critical cavitation pressure of the investigated ECWP at BEP increases, which indicates that the cavitation performance at BEP became worse. Compared with the internal flow field, we find vortex appears mainly in the blade passage near the tongue and volute outlet, and the region of the low static pressure is located in the blade inlet suction surface, and impeller inlet and outlet are the regions of high turbulence kinetic energy. Meanwhile, at the same flow rate, with the increase of blade outlet width, the areas of vortex and low static pressure become obvious and bigger.

Development of a modernized impeller of a liquid pump for a truck cooling system

2020 ◽  
Keyword(s):  
Numerical Simulation ◽  
Cooling System ◽  
Experimental Tests ◽  
Pump Efficiency ◽  
Optimized Design ◽  
Vane Pump ◽  
Engine Cooling ◽  
Experimental Stand ◽  
Truck Engine ◽  
Liquid Pump

The article presents the development of a technologically advanced and inexpensive wheel vane pump for a truck engine cooling system. To accomplish this task, a numerical simulation of a regular impeller was carried out, and its characteristics were also obtained from the experimental stand. The verification of the computational model of a regular impeller is carried out. Then, in the existing dimensions, the design of the open impeller wheel was developed and its numerical simulation was carried out. The developed impeller works quite efficiently and at the highest values of efficiency. The efficiency of the pump during operation as part of the engine is maximum and equal to 0.552—0.579. The maximum pump efficiency is 0.579 and is achieved at the highest speeds with a wheel speed of 4548 rpm and a flow rate of 655 l/min. Keywords centrifugal pump, CFD analysis, performance characteristics, optimized design, experimental tests, numerical simulation

scholarly journals Numerical and experimental study of variable speed automobile engine cooling water pump

2020 ◽  
Vol 103 (2) ◽  
pp. 003685042092522 ◽  
Author(s):  
Wei Li ◽  
Leilei Ji ◽  
Lingling Ma ◽  
Yongfei Yang ◽  
Ling Zhou ◽  
...  
Keyword(s):  
Flow Rate ◽  
Cooling Water ◽  
Internal Flow ◽  
Water Pump ◽  
Tip Leakage Flow ◽  
Rate Condition ◽  
Rotating Speed ◽  
Engine Cooling ◽  
Cavitation Performance ◽  
Rotor Stator Interaction

To investigate the performance of engine cooling water pump in automobile with variable rotating speed, experimental tests and numerical simulation are carried out on an engine cooling water pump under the rotating speed of 2650, 2960, 3700, and 4300 r/min. The hydraulic performance under 3700 r/min rotating speed and the cavitation performance under 340 L/min flow rate are tested and analyzed. The predicted results agree well with the experimental results, indicating that the simulation has high accuracy. The results show that the head of engine cooling water pump increases gradually and the best-effective region moves toward high flow rate condition with the increase in rotating speed. The augment of rotating speed would deteriorate the internal flow fields and causes more energy losses, which is due to the increase in tip leakage flow and enhancement of rotor–stator interaction effects. And, the rotor–stator interaction effect is sensitive to the temperature under various rotating speeds. Furthermore, the required net positive suction head increases with the increase in rotational speed and anti-cavitation performance is weakened during cavitation conditions.

Investigation of the cavitation performance in an engine cooling water pump at different temperature

2020 ◽  
pp. 095765092098464
Author(s):  
We Li ◽  
Pu Wu ◽  
Yongfei Yang ◽  
Weidong Shi ◽  
Weiqiang Li
Keyword(s):  
High Speed ◽  
Cooling System ◽  
Cooling Water ◽  
High Speed Photography ◽  
Asymmetric Distribution ◽  
Water Pump ◽  
Engine Cooling ◽  
Cavitation Performance ◽  
Working Medium ◽  
Different Temperatures

Cavitation damage in engine cooling water pump is the main factor that shortens the lifespan of the cooling system and gives rise to undesirable phenomena such as vibration and noise. In order to reveal the influence of key factors such as temperature and speed on the cavitation performance of engine cooling water pump, the cavitation performance of the engine cooling water pump under different rotating speeds and temperatures is obtained through the experimental study, and the cavitation flow pattern in the engine cooling water pump under different temperatures is captured using high-speed photography. The result shows that, as the temperature of the working medium changes from 25 °C to 70 °C, the head of the pump increases by 5.9% under the part-loading condition, the efficiency has an increase by 7.1% near the design condition and the shaft power keeps decrease by about 5.6%. Cavitation performance under different rotating speeds is found not to agree with the similar law. With the increase of temperature, the inlet pressure of cavitation initial increases and the cavitation performance deteriorates, the cavitation distribution region inside the impeller gradually expands and presents asymmetric distribution, indicating that thermodynamic effect has a positive effect on the occurrence of cavitation in the engine cooling water pump.

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