Optimization Design of Sliding Bearing of Fuel Pump Based on CFD Method

2021 ◽  
Author(s):  
Jiangfeng Fu ◽  
Yao Jiang ◽  
Huacong Li ◽  
Jiaxing Zhu
Keyword(s):  
Optimization Design ◽  
Sliding Bearing ◽  
Fuel Pump ◽  
Cfd Method

Valve Plate for Piston Pump Cavitation Problem with the Damp Groove Structural Optimization

2014 ◽  
Vol 543-547 ◽  
pp. 154-157 ◽  
Author(s):  
Wei Liu ◽  
An Lin Wang ◽  
Xue Wen Shan ◽  
Xiao Lu Zhang ◽  
Tao Jiang
Keyword(s):  
Optimization Design ◽  
Design Method ◽  
Structural Parameters ◽  
Structure Design ◽  
Valve Plate ◽  
Piston Pump ◽  
Cavitation Performance ◽  
Groove Structure ◽  
Cfd Method ◽  
Rsm Model

To reduce the cavitation occurring on valve plate of typical Swashplate piston pump, an optimization design method was introduced to quantitively analyse the accurate relationship between structural jet grooves parameters and cavitation.Using the CFD method, the sunking and discharging process in piston pump was simulated dynamically.The damp grooves structure effect on both jet angle and pressure shock were analysed visually with a series of different parametrical grooves.By establishing parametrical damp groove model, the piston pumps dynamic analysis was integrated with the technologies of CFD analysis, experimental design and approximation model, etc.The mathematical model of plunger pressure in oil back period, jet angle and structural parameters of damp groove were established in the form of second-order RSM model. The damp groove structure of valve plate was optimized on the basis of the RSM model.Test data show that the anti-cavitation performance of optimized valve plate was increased obviouslyAnd this method provided theoretical foundation for the structure design of damp groove.

The Dynamic Analysis of SFD-Sliding Bearing Flexible Rotor System Based on Optimization Design

2012 ◽  
Vol 159 ◽  
pp. 355-360
Author(s):  
Ji Yan Wang ◽  
Rong Chun Guo ◽  
Xu Fei Si
Keyword(s):  
High Speed ◽  
Optimization Design ◽  
Critical Speed ◽  
Structural Parameters ◽  
Rotor System ◽  
Flexible Rotor ◽  
Optimization Analysis ◽  
Sliding Bearing ◽  
Critical Speeds ◽  
Design Variables

The paper establishes the mechanical model of SFD-sliding bearing flexible rotor system, adopting Runge-Kutta method to solve nonlinear differential equation, thus acquiring the unbalanced response curve and then gaining the first two critical speeds of the system. Meanwhile, the paper analyzes the sensitivity of the system on the first two critical speeds towards structural parameters, offering design variables to optimization analysis. Based on sensitivity analysis, genetic algorithm is employed to give an optimization analysis on critical speed, which aims to remove critical speed from working speed as much as possible. The critical speed ameliorates after the optimization which supplies theoretical basis as well as theoretical analysis towards the dynamic stability of high-speed rotor system and provides reference for the design of such rotor system.

scholarly journals Optimization Design of Minimum Total Resistance Hull Form Based on CFD Method

2018 ◽  
Vol 32 (3) ◽  
pp. 323-330 ◽  
Author(s):  
Bao-ji Zhang ◽  
Sheng-long Zhang ◽  
Hui Zhang
Keyword(s):  
Optimization Design ◽  
Total Resistance ◽  
Hull Form ◽  
Cfd Method

Structure Optimization Design and Airflow Numerical Simulation for Negative Pressure Isolated Cabin

2012 ◽  
Vol 490-495 ◽  
pp. 876-879
Author(s):  
Yan Jun Zhang ◽  
Feng Tian ◽  
Jian Yang ◽  
Qiu Ming Sun ◽  
Ming Xi Hu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Flow Rate ◽  
Negative Pressure ◽  
Optimization Design ◽  
Structure Optimization ◽  
The Body ◽  
Air Flow Rate ◽  
Design Requirements ◽  
Cfd Method ◽  
Structure Optimization Design

Structure optimization design of negative-pressure isolated cabin and numerical simulation for airflow are preformed by using CFD method，and trace of expiration contamination by patient are studied. Results show that when area of outlet setting as 4235mm2, the negative pressure in cabin reached -31.96 Pa meeting to the design requirements. And air flow rate near the head of the body are 0.14m/s, which is comfort for human and closing to test value(0.11m/s). Flow rate and pressure in the cabin distributed evenly in the most of the space of cabin, by which bio-safety and comfort was assured . Results also show that fresh air, after fully spreading, formed airflow to the feet above chest which can drive contaminants expelling from the mouth forming one-way flow to the feet direction, which can ensure maximum exhaust to discharge from cabin and air quality in the cabin improved.

Optimization Design of Rapid-Cooling Mixer of By-Pass System of Cement Production Based on CFD

2014 ◽  
Vol 670-671 ◽  
pp. 814-818
Author(s):  
Ya Mao ◽  
Wei Fu ◽  
Zuo Bing Chen
Keyword(s):  
Flow Field ◽  
Optimization Design ◽  
High Energy ◽  
Structure Design ◽  
Cement Industry ◽  
Volatile Components ◽  
Rapid Cooling ◽  
Pass System ◽  
Cfd Method ◽  
Cooling Air

In the situation that energy is increasingly grim, how to use high-sulfur fuel effectively and reasonably is a big problem for high-energy consumption cement industry. But high-sulfur fuel will also brought up crusting problem because of higher concentration of circulating and accumulating volatile components. By-pass system can resolve this problem. Rapid-cooling mixer is key equipment for by-pass system. The thermal flow field inside the mixer determines the performance of rapid-cooling mixer directly. CFD method is used to simulate the flow field and temperature field inside mixer. The simulation result help to guide and test the improvement of mixer structure design. After optimization structure design, the mixing of hot gas and cooling air is full and strong inside mixer that leads to excellent cooling effect and good protection for equipment from crusting.

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.

Optimization Design of the Lawn Mowing Vehicle's Blade Based on Aerodynamics

2011 ◽  
Vol 199-200 ◽  
pp. 173-181
Author(s):  
Li Zu ◽  
Lei Zhang ◽  
Hua Kun Wang
Keyword(s):  
High Speed ◽  
Optimization Design ◽  
Air Flow ◽  
Optimized Design ◽  
Motion Model ◽  
Flow Conditions ◽  
Air Movement ◽  
Blade Tip ◽  
Cfd Method ◽  
Stable Flow

In this paper, air movement states within the cutter deck caused by high-speed rotating blades are studied, impacts on the mowing blade by the air movement are analyzed with the consideration of the cutter structure. It will provide important references for the blade optimal design. By Computational Fluid Dynamics (shortened as CFD) method, the high relative speed motion model between the blade and air flow is established, the flow field through the blade tip section are simulated, and the instantaneous movement of air flow around the blade can be known. By the analysis of the aerodynamic influence, the optimized design of the mowing blade can be achieved. The lawn mowing vehicle with the optimized blade can have a good and stable flow conditions when cutting the grass, the performance and the value of the vehicle thereby are enhanced.

Bearing-Rotor Coupled System Stability Optimization Design Based on Genetic Algorithm

2011 ◽  
Vol 199-200 ◽  
pp. 1130-1133
Author(s):  
Yu Feng Ding ◽  
Lin Gan ◽  
Jun Bo Zhou ◽  
Bu Yun Sheng
Keyword(s):  
Genetic Algorithm ◽  
Optimization Design ◽  
Mutual Coupling ◽  
Coupling Effect ◽  
Coupled System ◽  
System Stability ◽  
Design Parameters ◽  
Sliding Bearing ◽  
Design Variables ◽  
Algorithm Theory

The structure parameter of sliding bearing has significant influence on entire shafting. The structural optimization of elliptical sliding bearing based on the genetic algorithm theory is studied in the paper. Shafting logarithmic decrement is taken as the objective function, the bearing width-diameter ratio, relative clearance and main design parameters such as ellipticity is taken as design variables. Mutual coupling effect between sliding bearing and rotor is considered in the optimization model. An elliptical sliding bearing of shafting has been optimized, and the solution result shows that the shafting stability has been increased, it indicates this method is feasible.

Optimal Design in Flexible Rotor-Sliding Bearing System With Squeeze Film Damper

2003 ◽  
Author(s):  
Yong-Zhong Lu ◽  
Dao-Xun Liao
Keyword(s):  
Optimal Design ◽  
Optimization Design ◽  
System Optimization ◽  
System Stability ◽  
Squeeze Film ◽  
Inertia Force ◽  
Flexible Rotor ◽  
Sliding Bearing ◽  
Squeeze Film Damper ◽  
Bearing System

A dynamic model of a flexible rotor-sliding bearing system with squeeze film damper (SFD) is established. In the model are oil film inertia force, damping force, clearance excitation force, interference force of different frequencies and static load considered, as opposed to the previous research. On the basis of this model, then optimal design of the system is deeply studied. Simulation shows that the system optimization design can effectively improve the system stability.

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