gaoran
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- Professor
- Supervisor of Doctorate Candidates
- Supervisor of Master's Candidates
- Name (Pinyin):gaoran
- School/Department:建筑设备科学与工程学院
- Administrative Position:建筑设备科学与工程学院副院长
- Education Level:With Certificate of Graduation for Doctorate Study
- Professional Title:Professor
- Status:Employed
- Academic Titles:西安建筑科技大学建筑设备科学与工程学院副院长
- Other Post:西安建筑科技大学环境与市政工程学院教授
- Teacher College:建筑设备科学与工程学院

- Email:
- Paper Publications
Computational fluid dynamics study on the drag and flow field differences between the single and coupled bends
Release time:2024-08-09 Hits:
- Affiliation of Author(s):建筑设备科学与工程学院
- Journal:Building Sevices Engineering Research&Technology
- Key Words:中文关键字:管道;阻力;弯管;耦合弯管;能量耗散,英文关键字:Duct; drag; bend; coupled bend; energy consumption
- Abstract:Owing to the limited installation space and duct size, coupled fittings are common in the duct systems of buildings. The coupling effect leads to changes in drag and fan energy consumption. This study investigates duct drag and flow field characteristics under coupling conditions. Experiments and numerical simulations with the Reynolds stress model are conducted. Flow field changes, flow field deformation, and drag changes in the duct are analyzed. Regardless of the coupling form, the velocity near the inner arc is fast, whereas that near the outer arc is slow. Under three different coupling connection conditions (S-shaped, L-shaped, and U-shaped), the outlet velocity gradient of the U-shaped coupling connection is the least obvious. After the fluid flows through the bend, a significant centerline velocity reduction can be observed, even greater than that in the bend. The lowest centerline velocity lies within the range of 2.5 D to 4.5 D after the bend. Coupling connection has an insignificant effect on upstream duct resistance. The resistance of single bend is less than that of the downstream bend for the coupled bend and greater than that of the upstream bend under coupling conditions.
- Note:李安桂
- Co-author:陈仕扩,杨志刚,从北华
- First Author:李安桂[重名-待确认],gaoran
- Indexed by:Journal paper
- Volume:卷:
- Issue:期:
- Page Number:页:
- Translation or Not:no
- Date of Publication:2016-10-01