A Method of Wall Interference Correction for Kevlar Wall Test Section

2019 ◽  
Author(s):  
Hiroki Ura ◽  
Masashi Shigemi ◽  
Tomonari Hirotani ◽  
Tomoyuki Homma
Keyword(s):  
Test Section ◽  
Interference Correction

Global wall interference correction and control for the NWTC Transonic Test Section

1997 ◽  
Author(s):  
W. Sickles ◽  
F. Steinle, Jr. ◽  
W. Sickles ◽  
F. Steinle, Jr.
Keyword(s):  
Test Section ◽  
Interference Correction ◽  
And Control

Wall Interference Correction Method for Kevlar Wall Test Section

2020 ◽  
Vol 57 (5) ◽  
pp. 889-900
Author(s):  
Hiroki Ura ◽  
Masashi Shigemi ◽  
Tomonari Hirotani ◽  
Tomoyuki Homma
Keyword(s):  
Test Section ◽  
Correction Method ◽  
Interference Correction

WALL-INTERFERENCE CORRECTION FOR THE SURFACE-PRESSURE HYSTERESIS OF AN AIRFOIL UNDERGOING PLUNGING MOTION

2015 ◽  
Vol 39 (2) ◽  
pp. 293-305
Author(s):  
Mohammad Saeedi ◽  
Mahmoud Mani ◽  
Armin Hamta
Keyword(s):  
Numerical Simulation ◽  
Wind Tunnel ◽  
Test Section ◽  
Wind Tunnels ◽  
Far Field ◽  
Wind Tunnel Experiments ◽  
Interference Correction ◽  
Dimensional Parameters ◽  
Conventional Test ◽  
The Difference

In the current research, the results of a number of wind-tunnel experiments on a moving airfoil with plunging motion are presented. The experiments have been conducted in two different configurations which are tunnels with conventional and slotted test-section walls to provide resemblance to a far-field condition. The difference in results obtained from two test-section configurations can be considered as the wall effect and regulated as a function of non-dimensional parameters which can be further used for correcting experimental results obtained from conventional wind tunnels. When the derived correction factor is applied to a numerical simulation of a wind tunnel with a conventional test section (for points located in the front portion of the airfoil), the resulting pressure variations closely resembled that of a far-field numerical simulation. This methodology showed promising results for the specific configurations used in this research.

scholarly journals Experimental Determination of Stator Endwall Heat Transfer

1989 ◽  
Author(s):  
Robert J. Boyle ◽  
Louis M. Russell
Keyword(s):  
Heat Transfer ◽  
Liquid Crystal ◽  
Test Section ◽  
Electrical Power ◽  
Exhaust System ◽  
Ambient Air ◽  
Reynolds Numbers ◽  
Inlet Velocity ◽  
Turbine Vane

Local Stanton numbers were experimentally determined for the endwall surface of a turbine vane passage. A six vane linear cascade having vanes with an axial chord of 13.81 cm was used. Results were obtained for Reynolds numbers based on inlet velocity and axial chord between 73,000 and 495,000. The test section was connected to a low pressure exhaust system. Ambient air was drawn into the test section, inlet velocity was controlled up to a maximum of 59.4 m/sec. The effect of the inlet boundary layer thickness on the endwall heat transfer was determined for a range of test section flow rates. The liquid crystal measurement technique was used to measure heat transfer. Endwall heat transfer was determined by applying electrical power to a foil heater attached to the cascade endwall. The temperature at which the liquid crystal exhibited a specific color was known from a calibration test. Lines showing this specific color were isotherms, and because of uniform heat generation they were also lines of nearly constant heat transfer. Endwall static pressures were measured, along with surveys of total pressure and flow angles at the inlet and exit of the cascade.

Scaling of Heat Exchanger Tubes by Calcium Carbonate

1975 ◽  
Vol 97 (4) ◽  
pp. 504-508 ◽  
Author(s):  
A. P. Watkinson ◽  
O. Martinez
Keyword(s):  
Heat Exchanger ◽  
Calcium Carbonate ◽  
Mathematical Models ◽  
Flow Velocity ◽  
Test Section ◽  
Suspended Solids ◽  
Bulk Temperature ◽  
Fouling Resistance ◽  
Steam Temperature ◽  
Scaling Process

Scaling of copper heat exchanger tubes has been studied under conditions that promote rapid and severe scaling. Artificially hardened water of high dissolved and suspended solids is recirculated through a heated test section operated at constant steam temperature. The effects of flow velocity, tube diameter, and bulk temperature on the asymptotic fouling resistance have been determined. Results are interpreted in terms of mathematical models of the scaling process.

Accuracy of laser-ablation (LA)-MC-ICPMS Sr isotope analysis of (bio)apatite – a problem reassessed

2016 ◽  
Vol 31 (1) ◽  
pp. 259-269 ◽  
Author(s):  
Wolfgang Müller ◽  
Robert Anczkiewicz
Keyword(s):  
Laser Ablation ◽  
Isotope Analysis ◽  
Sr Isotope ◽  
Plasma Laser ◽  
Interference Correction

Accurate in situ Sr isotope analysis of (bio)apatite via ‘robust-plasma’ laser-ablation MC-ICPMS with negligible 40Ca31P16O and reliable 87Rb interference correction.

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