Study on the Behavior of Near-Field Dilution of Thermal Buoyant Jet Discharged Horizontally in Compound Open-Channel

HUAI Wen-xin; XIAO Qing-hua; ZENG Yu-hong; YANG Zhong-hua; QIAN Zhong-dong

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Article Navigation > Applied Mathematics and Mechanics > 2008 > 29(2): 239-246

HUAI Wen-xin, XIAO Qing-hua, ZENG Yu-hong, YANG Zhong-hua, QIAN Zhong-dong. Study on the Behavior of Near-Field Dilution of Thermal Buoyant Jet Discharged Horizontally in Compound Open-Channel[J]. Applied Mathematics and Mechanics, 2008, 29(2): 239-246.

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Study on the Behavior of Near-Field Dilution of Thermal Buoyant Jet Discharged Horizontally in Compound Open-Channel

State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, P. R. China

Received Date: 2007-03-13
Rev Recd Date: 2007-11-23
Publish Date: 2008-02-15

Abstract

Abstract

The RNG k-epsilon model with consideration of the buoyancy effect,which was solved by using the hybrid finite analytic method,was used to simulate the mixture of the horiz ontal round thermal buoyant jet in compound open channel flow.The mixing features near the spout and flowing characteristic of the secondary currents were studied by numerical simulation.Meanwhile,1) the distribution of the measured isovels for stream-wise velocity,2) secondary currents,3) the distribution of the measured isovels for temperature of typical cross-section near the spout,were obtained by using the three-dimensional Micro ADV and the temperature measuring device.Compared with experimental data,the RNG k-epsilon model based on buoyancy effect can preferably simulate the jet which performs the bifurcation phenomenon,jet reattachment(Conada effect) and beach secondary currents phenomenon with the effect of ambient flow,buoyancy,and secondary currents of compound section and so on.
- turbulence model,
- compound channel,
- buoyant jets,
- hybrid finite analytic method,
- secondary currents

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References(16)

References

[1]	Shiono K，Knight D. Turbulent open channel flows with variable depth across the channel[J].J Fluid Mech,1991,222(1):617-647. doi: 10.1017/S0022112091001246
[2]	Tominaga A, Nezu I. Turbulent structure in compound open channel flows[J].J Hydr Engrg,1991,117(1):21-41. doi: 10.1061/(ASCE)0733-9429(1991)117:1(21)
[3]	Naot D, Nezu I, Vakagawa H.Hydrodynamic behaviour of compound rectangular open channels[J].J Hydr Engrg,1993，119(3):390-408. doi: 10.1061/(ASCE)0733-9429(1993)119:3(390)
[4]	余常昭. 环境流体力学导论[M].北京：清华大学出版社，1992.
[5]	张燕，王道增，樊靖郁.流动环境中高浓度射流扩散实验研究[J].应用数学和力学，2002，23（12）：1276-1282.
[6]	槐文信. 浅水型同流污水排放近区稀释特性[J].水动力学研究与进展，1998，13（1）：79-86.
[7]	Johnston A J, Nguyen N.Volker R E.Round buoyant jet entering shallow water in motion[J].Journal of Hydraulic Research,1993,31(1):121-138. doi: 10.1080/00221689309498865
[8]	Johnston A J, Nguyen N,Volker R E.Round buoyant jet entering shallow water: bed shear velocity[J].Journal of Hydraulic Research,1994,32(2):233-250. doi: 10.1080/00221689409498726
[9]	Ramsey J W, Goldstein R J.Interaction of a heated jet with a deflecting steam[J].J Heat Transfer Trans ASME,1971,93(4):365-372. doi: 10.1115/1.3449832
[10]	Kamotani Y, Greber I. Experiments on a turbulent jet in a cross flow[J].AIAA J,1972,10(11):1425-1429. doi: 10.2514/3.50386
[11]	曾玉红，槐文信.横流中三维圆形垂直浮力射流特性数值分析[J].应用基础与工程科学学报，2005，13（2）：120-128.
[12]	槐文信，李炜，彭文启.横流中单圆孔紊动射流计算与特性分析[J].水利学报，1998，29(4)：7-14.
[13]	槐文信，梁爱国.浅水横流中底部水平热水射流近区的初始稀释——（Ⅰ）数学模型及其验证[J].四川大学学报，2005，37（3）：1-4.
[14]	梁爱国，槐文信.浅水横流中底部水平热水射流近区的初始稀释——（Ⅱ）特性分析 [J].四川大学学报，2005，37（4）：20-24.
[15]	陶文铨. 数值传热学[M].西安:西安交通大学出版社, 1998.
[16]	槐文信，赵明登，童汉毅.河道及近海水流数值模拟[M].北京: 科学出版社, 2005.