The numerical simulation of flow field and structure optimization design of the three-way catalytic converter based on FLUENT software

2011 ◽  
Author(s):  
Yin-shan Wang ◽  
Tong-guo Jia ◽  
Dong-peng Yue ◽  
Yu-long Zhang
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Optimization Design ◽  
Catalytic Converter ◽  
Structure Optimization ◽  
Fluent Software ◽  
Structure Optimization Design

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.

The Structure Optimization Design for the W-Type Metallic Sealing Ring Based on the MOGA Algorithm

2015 ◽  
Vol 727-728 ◽  
pp. 541-545
Author(s):  
Xiang Yu Ding
Keyword(s):  
Mechanical Properties ◽  
Optimal Design ◽  
Optimization Algorithm ◽  
Optimization Design ◽  
Structure Optimization ◽  
Ansys Software ◽  
Sealing Ring ◽  
Structure Optimization Design

This paper uses the ANSYS software to analysis the outer arm opening angel(OAOA) and the outer arm arc angle(OAAA) of W-type metallic sealing ring which can effects on the mechanical properties,obtained in that when the OAOA choose from 1.398°to 14.156 °and the OAAA choose from 30.21° to 59.5 °, the mechanical properties of the sealing ring can satisfy the requirement of use. Then using the MOGA optimization algorithm to optimize the design of W-type metallic sealing ring, and find when the OAOA choose 3.39°and the OAAA choose 32.18°are the optimal design of the W-type metallic sealing ring.

scholarly journals Numerical simulation and experimental research of cavitation nozzle based on equation curve

2021 ◽  
Author(s):  
Lifu Wang ◽  
Dongyan Shi ◽  
Zhixun Yang ◽  
Guangliang Li ◽  
Chunlong Ma ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Reynolds Number ◽  
Flow Field ◽  
High Speed ◽  
Quadratic Equation ◽  
Outer Contour ◽  
Study Results ◽  
Fluent Software ◽  
The Impact ◽  
Better Than

Abstract To further investigate and improve the cleaning ability of the cavitation nozzle, this paper proposes a new model that is based on the Helmholtz nozzle and with the quadratic equation curve as the outer contour of the cavitation chamber. First, the numerical simulation of the flow field in the nozzle chamber was conducted using FLUENT software to analyze and compare the impact of the curve parameters and Reynolds number on the cleaning effect. Next, the flow field was captured by a high-speed camera in order to study the cavitation cycle and evolution process. Then, experiments were performed to compare the cleaning effect of the new nozzle with that of the Helmholtz nozzle. The study results demonstrate that effective cavitation does not occur when the diameter of the cavitation chamber is too large. For the new nozzle, with the increase of the Reynolds number, the degree of cavitation in the chamber first increases and then decreases; the cleaning effect is much better than that of a traditional Helmholtz nozzle under the same conditions; the nozzle has the best cleaning effect for the stand-off distance of 300 mm.

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