Heat Transfer and Pressure Drop Correlations for Rectangular Channels with Ribs

doi:10.7652/xjtuxb201311001

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Heat Transfer and Pressure Drop Correlations for Rectangular Channels with Ribs

更新时间：2025-07-09

- Heat Transfer and Pressure Drop Correlations for Rectangular Channels with Ribs
- Vol. 47, Issue 11, Pages: 1-6(2013)
- 作者机构：
  
  西安交通大学机械制造系统工程国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201311001
  CLC： TK47
- Online First：10 November 2013，
  
  Published：2013
- 稿件说明：
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Heat Transfer and Pressure Drop Correlations for Rectangular Channels with Ribs[J]. 2013, 47(11): 1-6.
DOI：

Heat Transfer and Pressure Drop Correlations for Rectangular Channels with Ribs[J]. 2013, 47(11): 1-6. DOI： 10.7652/xjtuxb201311001.

摘要

针对燃气透平叶片蒸汽冷却问题

建立了透平叶片内冷通道实验系统。该系统主要包括蒸汽的发生器和调节器、整流段、带测量仪器的实验段、实验段加热装置、排气段、数据采集系统和控制系统。对10种不锈钢带肋实验段中的蒸汽传热和摩擦特性进行了实验研究

其中实验段的宽高比分别为0.25、0.5、1、2、4

肋角度分别为30°、45°、60°、90°

雷诺数为10 000～80 000

由此建立了反映雷诺数、肋角度和通道宽高比影响的传热和摩擦特性实验关联式。结果表明:带肋面宽度的增加使得蒸汽的传热和摩擦阻力增大; 雷诺数的增加使得蒸汽的传热显著增强

但是对流动摩擦因子的影响不大; 肋角度为60°时蒸汽传热和摩擦系数最大。该结果可为先进的高温燃气透平蒸汽冷却叶片的设计研究提供参考。

Abstract

To study the steam cooling technology for gas turbine blades

an experiment system was established including a steam generation and conditioning subsystem

a pre-plenum

a test section with instrumentation

a heating device for the test channel

an after-plenum and a data acquisition and control system. The heat transfer and friction loss characteristics of fully developed turbulent steam flow in 10 different ribbed rectangular channels were experimentally examined. The combined effect of the aspect ratio(W/H=0.25

0.5

2 and 4)

the rib angle-of-attack(α=30°

45°

60° and 90°)and Reynolds number(10

000 to 80

000)was analyzed. Semi-empirical correlations of heat transfer and friction were developed considering the influences of the channel aspect ratio

rib angle

and Reynolds number. The results show that an increase in the ribbed surface width increased both the heat transfer and friction loss of steam flow. The increase in Reynolds number enhanced the heat transfer significantly but had slight effect on the friction loss. The maximum heat transfer coefficient and friction factor were obtained at the channel with 60° ribs. These conclusions may provide reference to the advanced steam-cooled blade design for gas turbines.

关键词

Keywords

references

FACCHINI B, INNOCENTI L, CARNEVALE E. Evaluation and comparison of different blade cooling solutions to improve cooling efficiency and gas turbine performances, 2001-GT-0571 [R]. New York, USA: ASME, 2001.

JORDAL K, TORISSON T. Comparison of gas turbine cooling with dry air, humidified air and steam, 2000-GT-0169 [R]. New York, USA: ASME, 2000.

BOHN D, REN L, KUSTERER K. Investigation of the steam-cooled blade in a steam turbine cascade [J]. Journal of Aerospace Power, 2007, 22(5):673-682.

杜达·韩介勤·桑地普, 艾卡德·斯瑞纳斯. 燃气轮机传热和冷却技术 [M]. 程代京, 等译. 西安: 西安交通大学出版社, 2005: 1-15.

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TANDA G. Effect of rib spacing on heat transfer and friction in a rectangular channel with 45° angled rib turbulators on one/two walls [J]. International Journal of Heat and Mass Transfer, 2011, 54(5): 1081-1090.

WANG L B, TAO W Q, WANG Q W, et al. Experimental study of developing turbulent flow and heat transfer in ribbed convergent/divergent square ducts [J]. International Journal of Heat and Fluid Flow, 2001, 22(6): 603-613.

LIU J, GAO J, GAO T, et al. Heat transfer characteristics in steam-cooled rectangular channels with two opposite rib-roughened walls [J]. Applied Thermal Engineering, 2013, 50(1): 104-111.

LIU Jiazeng, GAO Jianmin, GAO Tieyu, et al. Heat transfer in narrow rectangular channels with rib turbulators [J]. Advanced Materials Research, 2011, 354/355: 1245-1251.

LIU Jiazeng, GAO Jianmin, GAO Tieyu. Forced convection heat transfer of steam in a square ribbed channel [J]. Journal of Mechanical Science and Technology, 2012, 26(4): 1291-1298.

KLINE S J, MCCLINTOCK F A. Describing experimental uncertainties in single-sample experiments [J]. Mech Eng, 1953, 75(1): 3-8.

ZHANG Y M, GU W Z, HAN J C. Heat transfer and friction in rectangular channels with ribbed or ribbed-grooved walls [J]. ASME Journal of Heat Transfer, 1994, 116(1): 58-65.

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