实验流体力学

2011, 25(4)

Abstract(47) PDF(1)

Abstract:

Measurement of phase difference for eddy viscosity model equation of turbulence

GUO Ai-dong, JIANG Nan, JIA Yong-xia

2011, 25(4): 1-8. doi: 10.3969/j.issn.1672-9897.2011.04.001

Abstract(93) PDF(2)

Abstract:

Investigation of flow separation control on an airfoil using DBD plasma actuators

WANG Xun-nian, WANG Wan-bo, HUANG Yong, ZHANG Xin, HUANG Zong-bo

2011, 25(4): 9-14. doi: 10.3969/j.issn.1672-9897.2011.04.002

Abstract(157) PDF(7)

Abstract:
Influence of plasma actuators on the flow separation control of NACA 0015 airfoil was investigated in an open-circuit low-speed wind tunnel.Particle Image Velocimetry(PIV)technology was applied to visualize the modification of the flow structure over the airfoil by the plasma actuators.Lift and drag were measured by a five-component strain gauge balance to investigate the separation control effect of the actuator voltage and excitation frequency.The results show that the leading-edge plasma actuators are effective in controlling the flow separation over the airfoil at low wind speeds.The maximum lift coefficient and stall angle are increased by 11%and 6 deg respectively at the free-stream velocity of 20m/s.However,at a given flow state,there exists threshold values for both the actuator voltage and excitation frequency on the actuators.The threshold values are different with the changing attack angles.At the higher attack angles,the plasma actuator's authority must be increased due to the much stronger flow separation on the airfoil.

Investigation on wind profiles in the deep gorge at the Balinghe bridge site via field measurement

ZHU Le-dong, REN Peng-jie, CHEN Wei, ZHOU Cheng, WANG Ji-quan

2011, 25(4): 15-21. doi: 10.3969/j.issn.1672-9897.2011.04.003

Abstract(84) PDF(4)

Abstract:

PIV investigation on flow induced by plasma aerodynamic actuation

LIANG Hua, LI Ying-hong, SONG Hui-min, JIA Min, WU Yun

2011, 25(4): 22-25,36. doi: 10.3969/j.issn.1672-9897.2011.04.004

Abstract(89) PDF(6)

Abstract:

Investigation on dispersed droplets behavior in a shear flow

WANG Liang, DONG Shou-ping, ZHANG Jian, GUO Chang-hui, ZHOU Jian-ping, ZHANG Ming-ming, WANG Hui-juan

2011, 25(4): 26-31. doi: 10.3969/j.issn.1672-9897.2011.04.005

Abstract(85) PDF(9)

Abstract:

Experimental study on flow field of high temperature supersonic impinging jet injected by water

JIANG Yi, ZHOU Fan, ZHANG Xue-wen

2011, 25(4): 32-36. doi: 10.3969/j.issn.1672-9897.2011.04.006

Abstract(103) PDF(6)

Abstract:

Lift-enhancement of canard-spanwise pulsed blowing of non-coplanar close-coupled canard configuration

LIU Jie, LIU Pei-qing, CAO Shuo

2011, 25(4): 37-41. doi: 10.3969/j.issn.1672-9897.2011.04.007

Abstract(150) PDF(8)

Abstract:

Experimental research on characteristic of density gradient in a compressible mixing layer

GAN Cai-jun, LI Lang, MAO Tao, XIONG Hong-liang

2011, 25(4): 42-44,59. doi: 10.3969/j.issn.1672-9897.2011.04.008

Abstract(159) PDF(2)

Abstract:

Study on centeral-dump combustor by PIV

LI Hao, LIN Ming, ZHANG Yu-shan, SHEN Ji-kui, CHEN Chun-de

2011, 25(4): 45-49,59. doi: 10.3969/j.issn.1672-9897.2011.04.009

Abstract(100) PDF(6)

Abstract:

Wind tunnel observation on the effect of a porous fence on shelter of a triangular coal pile

ZHANG Ning, CHEN Ting-guo, Sang-jo0nLee

2011, 25(4): 50-54. doi: 10.3969/j.issn.1672-9897.2011.04.010

Abstract(71) PDF(3)

Abstract:

Prediction of the performance of cone flowmeters installed with an upstream expander

LI Yan-mei, XU Ying, ZHANG Chao-long, GUO Yu, TANG Fei

2011, 25(4): 55-59. doi: 10.3969/j.issn.1672-9897.2011.04.011

Abstract(97) PDF(2)

Abstract:

Estimates value of the expected wind speed in straits area wind environment using extreme value distribution scheme

LIU Hui, ZHANG Liang-liang, YANG Zhuan-yun, HE Wei

2011, 25(4): 60-66. doi: 10.3969/j.issn.1672-9897.2011.04.012

Abstract(95) PDF(2)

Abstract:
For important bridges,it is required by the Wind-resistant Design Code for Highway Bridges that a reasonable basic design wind speed be selected from the results obtained either by re-observing the basic design wind speed at bridge site or by referring to the samples of measured wind speed.In this paper,the design wind speed of Xiamen-Zhangzhou Cross-sea Bridge corresponding to different return period was calculated using three extreme value distribution schemes with the extreme value of the wind speed and its corresponding wind direction standard value taken from 360 months' 10-minute-time-interval observation by Xiamen Observatory and Longhai Weather Bureau.It is obtained that the 100-year return period expected wind speed at the bridge site is 35.8m/s,lower than 39.7m/s as given in the Code.

Discussion on flow pattern determination method of shallow flow on slope surface

ZHANG Kuan-di, WANG Guang-qian, LU Hong-xing, WANG Zhan-li

2011, 25(4): 67-73. doi: 10.3969/j.issn.1672-9897.2011.04.013

Abstract(105) PDF(2)

Abstract:

Key design techniques of the low noise continuous transonic wind tunnel

LIAO Da-xiong, CHEN Ji-ming, PENG Qiang, LIU Xin-min

2011, 25(4): 74-78. doi: 10.3969/j.issn.1672-9897.2011.04.014

Abstract(101) PDF(11)

Abstract:

Precision investigation on model displacement videogrammetric measurement in 2.4m transonic wind tunnel