Visualization Using Shear Sensitive Liquid Crystal for A Rocket Nozzle Flow Field Containing Separation Bubbles

2002 ◽  
Vol 22 (1Supplement) ◽  
pp. 467-470
Author(s):  
Takeo TOMITA ◽  
Mamoru TAKAHASHI ◽  
Masahiro TAKAHASHI ◽  
Hiroshi TAMURA ◽  
Kenji AOKI
Keyword(s):  
Liquid Crystal ◽  
Flow Field ◽  
Nozzle Flow ◽  
Rocket Nozzle ◽  
Separation Bubbles

The Effect of a Downstream Rotor on the Measured Performance of a Transonic Turbine Nozzle

1986 ◽  
Vol 108 (2) ◽  
pp. 269-274
Author(s):  
R. G. Williamson ◽  
S. H. Moustapha ◽  
J. P. Huot
Keyword(s):  
Performance Evaluation ◽  
Aspect Ratio ◽  
Flow Field ◽  
Large Scale ◽  
Outer Wall ◽  
Nozzle Flow ◽  
Turning Angle ◽  
Low Aspect Ratio ◽  
Transonic Turbine ◽  
Mach Numbers

Two nozzle designs, involving the same low aspect ratio, high turning angle vanes, and differing in outer wall contour, were tested over a range of exit Mach numbers up to supersonic values. The experiments were conducted on a large-scale, full annular configuration with and without a representative rotor downstream. Nozzle performance was found to be significantly affected by rotor operation, the influence depending on the detailed characteristics of the nozzle flow field, as well as on the design and operation of the rotor itself. It is suggested that performance evaluation of low aspect ratio nozzles of high turning angle may require appropriate testing with a rotor.

Aerothermal Investigation of a Single Row Divergent Narrow Impingement Channel by Particle Image Velocimetry and Liquid Crystal Thermography

2016 ◽  
Vol 138 (5) ◽  
Author(s):  
Alexandros Terzis ◽  
Christoforos Skourides ◽  
Peter Ott ◽  
Jens von Wolfersdorf ◽  
Bernhard Weigand
Keyword(s):  
Heat Transfer ◽  
Particle Image Velocimetry ◽  
Liquid Crystal ◽  
Flow Field ◽  
Particle Image ◽  
Field Measurements ◽  
Single Row ◽  
Transient Techniques ◽  
Liquid Crystal Thermography ◽  
Image Velocimetry

Integrally cast turbine airfoils with wall-integrated cooling cavities are greatly applicable in modern turbines providing enhanced heat exchange capabilities compared to conventional cooling passages. In such arrangements, narrow impingement channels can be formed where the generated crossflow is an important design parameter for the achievement of the desired cooling efficiency. In this study, a regulation of the generated crossflow for a narrow impingement channel consisting of a single row of five inline jets is obtained by varying the width of the channel in the streamwise direction. A divergent impingement channel is therefore investigated and compared to a uniform channel of the same open area ratio. Flow field and wall heat transfer experiments are carried out at engine representative Reynolds numbers using particle image velocimetry (PIV) and liquid crystal thermography (LCT). The PIV measurements are taken at planes normal to the target wall along the centerline for each individual jet, providing quantitative flow visualization of jet and crossflow interactions. The heat transfer distributions on the target plate of the channels are evaluated with transient techniques and a multilayer of liquid crystals (LCs). Effects of channel divergence are investigated combining both the heat transfer and flow field measurements. The applicability of existing heat transfer correlations for uniform jet arrays to divergent geometries is also discussed.

Preliminary CFD analysis of the vortex hybrid rocket chamber and nozzle flow field

1998 ◽  
Author(s):  
William Knuth ◽  
Daniel Gramer ◽  
Martin Chiaverini ◽  
J. Sauer ◽  
R. Whitesides ◽  
...  
Keyword(s):  
Flow Field ◽  
Nozzle Flow ◽  
Cfd Analysis ◽  
Hybrid Rocket

Simulation Supersonic Steam Flow in a Converging–Diverging Nozzle Using Different State Equations

2011 ◽  
Vol 88-89 ◽  
pp. 56-59
Author(s):  
Li Bo Zhou ◽  
Ming Hui Zhou
Keyword(s):  
Flow Field ◽  
Steam Flow ◽  
Nozzle Flow ◽  
State Equations ◽  
Real Gas ◽  
The Difference ◽  
Cfd Method

In order to learn the difference and accuracy of state equations in supersonic steam flow, a classic converging–diverging nozzle flow field was simulated using CFD method. Compared to experiment value, the results shows that IF97 real gas model agrees well, and several parameters were discussed. This paper will providing fundamental basis for SE choosing in supersonic steam simulation field.

Study of Different Angle Inner Nozzle Flow Field Based on Suction-Type RC Bit

2011 ◽  
Author(s):  
Zhu Lihong ◽  
Wang Ruihe ◽  
Ni Hongjian ◽  
Liu Jianlin ◽  
Yin Kun ◽  
...  
Keyword(s):  
Flow Field ◽  
Nozzle Flow
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