Optimization research on deflectors installed in rightangle bend tube with rectangular section

Abstract

Abstract:

In order to improve the flow field uniformity in a rightangle bent tube with rectangular section, the fluid flow in the elbow was numerically simulated by FLUENT software. The effects of the uniformity of flow field and local resistance and energy loss in the elbow were analyzed by using different quantities and structures of flow deflectors. The results show that the velocity distribution is not uniform, vortex and secondary flow occurs when the flow deflectors are not installed in the elbow, while the uniformity of flow field can be effectively improved after arranging the deflector plates; using a reasonable number of baffles can not only effectively improve the flow field uniformity and completely eliminate the vortex and secondary flow caused by the rightangle elbow, but also greatly reduce the flow resistance and energy loss. Through the numerical simulation analysis of the deflectors of three different design schemes, the optimal number and structure of the deflectors are obtained.

Key words:

font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">rightfont-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">angle bent tube, flow field uniformity, deflectors, numerical simulation

WANG Zhoujun1,2，LI Xinghua2，TANG Lijun1，DUAN Quansheng2.

Optimization research on deflectors installed in rightangle bend tube with rectangular section [J]. Huadian Technology, 2019, 41(8): 32-37.

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Optimization research on deflectors installed in rightangle bend tube with rectangular section

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