Investigation of the influence of various numbers of impeller blades on internal flow field analysis and the pressure pulsation of an axial pump based on transient flow behavior

Heat Transfer ◽  
2020 ◽  
Vol 49 (4) ◽  
pp. 2000-2024 ◽  
Author(s):  
Ahmed Ramadhan Al‐Obaidi
Keyword(s):  
Flow Field ◽  
Pressure Pulsation ◽  
Transient Flow ◽  
Flow Behavior ◽  
Internal Flow ◽  
Field Analysis ◽  
Axial Pump ◽  
Flow Field Analysis

Internal Flow Field Analysis of Air-Suction Roller-Type Precision Metering Device

2014 ◽  
Vol 620 ◽  
pp. 84-88
Author(s):  
Chuang Ren ◽  
Qing Hui Lai ◽  
Zhao Guo Zhang ◽  
Xiao Jun Gao ◽  
Zeng Yao Wang ◽  
...  
Keyword(s):  
Flow Field ◽  
Flow Velocity ◽  
Internal Flow ◽  
Field Analysis ◽  
Structure Parameter ◽  
Wall Function ◽  
Real Gas ◽  
Area Increase ◽  
Center Axis ◽  
Flow Field Analysis

In order to analyze the influence of structure parameter of air-suction roller-type precision metering device on the flow velocity and pressure, the flow field was calculation and simulation. Take the compressibility and the viscosity of the real gas into account, the N-S equations, RNG k-ε turbulence model and wall function were applied to measure the flow rate and pressure of the outlet under the conditions of changing the area of the suction holes and the diameter of shaft. The results revealed that compared with the shaft holes area, the diameter of center axis have a marked influence on the flow velocity and pressure of outlet. When the area of suction holes is constant, with the increase of shaft diameter, the outlet velocity increased and pressure decreased; when the diameter of axle is constant, with the shaft holes area increase, the outlet velocity increased and pressure decreased.

Research on Numerical Investigation and Test Verification of Brake Performance in a Hydrodynamic Tractor-Retarder Assembly

2010 ◽  
Vol 97-101 ◽  
pp. 3357-3361
Author(s):  
Wei Wei ◽  
Qing Dong Yan ◽  
Jing Yan Wu
Keyword(s):  
Experimental Data ◽  
Flow Field ◽  
Internal Flow ◽  
Torque Converter ◽  
Field Analysis ◽  
Rotating Speed ◽  
Spiral Vortex ◽  
Work Mechanism ◽  
Flow Field Analysis ◽  
Brake Performance

The brake performance of a hydrodynamic tractor-retarder assembly, which is the combination of torque converter and hyaulic retarder, was studied to explore its work mechanism. Spiral vortex distribution pattern of internal flow field in the assembly was discovered on the basis of reasonable boundary condition, where runaway speed of stator was determined by CFD analysis. Comparison of experimental data and flow field analysis shows that accurate brake performance of hydrodynamic tractor-retarder assembly can be calculated only by 3D flow field analysis presently and numerical simulation results is close to experimental data, and approximate linear relationship exists between runaway speed of stator and rotating speed of pump.

The CFD Analysis of Internal Flow Field in Turbocharger Compressor

2014 ◽  
Vol 628 ◽  
pp. 279-282 ◽  
Author(s):  
Xiang Ling Liu ◽  
Liao Ping Hu ◽  
Jin Ke Gong ◽  
Jia Qiang E
Keyword(s):  
Flow Field ◽  
Optimization Design ◽  
Gasoline Engine ◽  
Flow Analysis ◽  
Internal Flow ◽  
Field Analysis ◽  
Analysis Model ◽  
Vaneless Diffuser ◽  
Flow Field Analysis ◽  
Cfd Method

In this paper, the 3D flow analysis model of gasoline engine turbocharger compressor was built by using the software NUMECA. The flow fields of the vaneless diffuser and volute, such as airflow velocity field, temperature field, pressure field and the entropy field were simulated. The internal flow performance of the vaneless diffuser and volute were analyzed. The simulation results show that the field changes accord with the compressor characteristics, thus the vaneless diffuser and volute of the compressor design is reasonable. The approach of numerical simulation and flow field analysis by using CFD method can accurately predict the compressor performance. The research methods and conclusions provide theoretical and practical reference for the optimization design of the compressor.

scholarly journals Research on Identification Method of Wear Degradation of External Gear Pump Based on Flow Field Analysis

Sensors ◽  
2020 ◽  
Vol 20 (14) ◽  
pp. 4058
Author(s):  
Rui Guo ◽  
Yongtao Li ◽  
Yue Shi ◽  
Hucheng Li ◽  
Jingyi Zhao ◽  
...  
Keyword(s):  
Flow Field ◽  
Internal Flow ◽  
Accelerated Life Test ◽  
Field Analysis ◽  
Gear Pump ◽  
External Gear Pumps ◽  
Gear Pumps ◽  
Flow Field Analysis ◽  
External Gear Pump ◽  
Degradation State

As a kind of hydraulic power component, the external gear pump determines the performance of the entire hydraulic system. The degradation state of gear pumps can be monitored by sensors. Based on the accelerated life test (ALT), this paper proposes a method to identify the wear degradation state of external gear pumps based on flow field analysis. Firstly, the external gear pump is theoretically analyzed. Secondly, dynamic grid technology is used to simulate the internal flow field of the gear pump in detail. Finally, the theoretical and simulation results are verified by the ALT. The results show that this method can effectively identify the wear degradation status of four sample pumps. The results of the work not only provide a solution to the research on the wear degradation of external gear pumps, but also provide strong technical support for the predictive maintenance of hydraulic pumps.

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