scholarly journals Steady-State Analysis of Gas Flow Field in Anti-Sulfur High-Pressure Separator

2014 ◽  
Vol 03 (03) ◽  
pp. 124-130
Author(s):  
选禹 盛
Keyword(s):  
High Pressure ◽  
Steady State ◽  
Flow Field ◽  
Gas Flow ◽  
Steady State Analysis ◽  
Gas Flow Field ◽  
State Analysis

A Numerical Study of Heat Transfer from an Array of Jets Impinging on a Flat Moving Surface

2022 ◽  
Author(s):  
Sanil Shah
Keyword(s):  
Heat Transfer ◽  
Steady State ◽  
Flow Field ◽  
Turbulent Flow ◽  
Transient Analysis ◽  
Numerical Study ◽  
Moving Surface ◽  
Steady State Analysis ◽  
Surface Motion ◽  
State Analysis

Abstract Numerical study of heat transfer between circular jet arrays and the flat moving surface is carried out. Two jet patterns: inline and staggered, are chosen. Total nine circular jets are used in both jet patterns. The analysis is carried out for steady-state and transient conditions with the turbulent flow of jet fluid. In steady-state analysis, the influence of surface motion on the flow field and heat transfer by the array of jets is analyzed. The surface-to-jet velocity ratio (r) varies from 0 to 2. In transient analysis, the effect of jet pattern on the cooling of hot moving plate is analyzed. The two-equation shear stress transport (SST) k-? turbulence model is used for solving Reynolds averaged Navier-Stokes (RANS) equations of conservation of mass, momentum, and energy for incompressible turbulent flow. The steady-state analysis shows that surface motion has a significant effect on the flow field and heat transfer. The transient analysis results show that a staggered jet pattern cools the plate more uniformly than an inline jet pattern.

scholarly journals Temperature rise characteristics for angular-contact ball bearings with oil-air lubrication based on fluid-solid conjugate heat transfer

2021 ◽  
Vol 13 (1) ◽  
pp. 168781402199092
Author(s):  
Miaomiao Li ◽  
Yu Wang ◽  
Weifang Chen ◽  
Rupeng Zhu
Keyword(s):  
Heat Transfer ◽  
Steady State ◽  
Flow Field ◽  
Temperature Rise ◽  
Conjugate Heat Transfer ◽  
Operating Conditions ◽  
Ball Bearings ◽  
Analysis Model ◽  
Steady State Analysis ◽  
State Analysis

At present, the thermal analysis of oil-air-lubricated angular-contact ball bearings uses empirical heat transfer coefficients to calculate heat transfer. This approach presents problems such as simulating the actual lubrication flow field and ignoring the internal heat conduction in the bearing ring. This paper proposes a CFD steady-state analysis model of oil-air-lubricated angular-contact ball bearings based on fluid-solid conjugate heat transfer to analyze the flow field and temperature field. A temperature rise test of oil-air-lubricated angular-contact ball bearings was carried out to verify the positive determination of the simulation analysis results. Based on a fluid-solid conjugate heat transfer steady-state analysis model, the effects of lubrication parameters, operating conditions, and rolling element materials on the temperature rise characteristics of oil-air-lubricated angular-contact ball bearings were studied. The research results provide a method for analyzing the temperature rise characteristics of oil-lubricated bearings and provide a basis for the analysis of oil-lubricated bearing life.

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