Quantitative information from helium bubble flow visualization usingcomputer graphics techniques

1976 ◽  
Author(s):  
D. ROGERS
Keyword(s):  
Flow Visualization ◽  
Quantitative Information ◽  
Bubble Flow ◽  
Helium Bubble

Color helium bubble flow-visualization technique

1989 ◽  
Vol 26 (6) ◽  
pp. 499-502 ◽  
Author(s):  
Zhao Dong ◽  
Wang Zhongqi ◽  
Zhang Xiaodi ◽  
Qin Jialin ◽  
Lang Xianzhong
Keyword(s):  
Flow Visualization ◽  
Bubble Flow ◽  
Visualization Technique ◽  
Helium Bubble

An extended use of the hydrogen bubble flow visualization method

AIAA Journal ◽  
1965 ◽  
Vol 3 (6) ◽  
pp. 1203-1203 ◽  
Author(s):  
WILLIAM O. CRIMINALE ◽  
R. W. NOWELL
Keyword(s):  
Flow Visualization ◽  
Bubble Flow ◽  
Visualization Method ◽  
Hydrogen Bubble

Hydrogen bubble flow visualization at low Reynolds numbers.

AIAA Journal ◽  
1969 ◽  
Vol 7 (8) ◽  
pp. 1635-1637 ◽  
Author(s):  
FREDERICK W. ROOS ◽  
WILLIAM W. WILLMARTH
Keyword(s):  
Flow Visualization ◽  
Reynolds Numbers ◽  
Bubble Flow ◽  
Hydrogen Bubble ◽  
Low Reynolds Numbers ◽  
Low Reynolds

Effects of Leaning and Curving of Blades With High Turning Angles on the Aerodynamic Characteristics of Turbine Rectangular Cascades

1994 ◽  
Vol 116 (3) ◽  
pp. 417-424 ◽  
Author(s):  
Han Wanjin ◽  
Wang Zhongqi ◽  
Tan Chunqing ◽  
Shi Hong ◽  
Zhou Mochun
Keyword(s):  
Flow Field ◽  
Aerodynamic Characteristics ◽  
Acute Angle ◽  
Obtuse Angle ◽  
Bubble Flow ◽  
Helium Bubble ◽  
Negatively Curved ◽  
Horseshoe Vortices ◽  
Logical Result

To understand the effects of the origination and development of centralized vortices on the aerodynamic characteristics of turbine rectangular cascades with high turning angles, experiments with five-hole microspherical probes, accompanied by color helium bubble flow displays, were carried out. The measurement planes are arranged as three before, six in, and one after the cascade. The experiments reveal that the origination and development of horseshoe vortices and passage vortices as well as the interaction of the latters almost dominate the whole flow field of traditional linear cascades. Lean linear cascades favor the horseshoe vortices and passage vortices in the acute angle zone, and impede those in the obtuse angle zone. So it is a logical result to adopt the negatively curved blades, whose pressure surfaces and both endwalls compose both obtuse angles, respectively, to improve the cascade aerodynamic characteristics.

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