Generation and characterization of a non-stationary flow field in a small-scale wind tunnel using a multi-blade flow device

2019 ◽  
Vol 186 ◽  
pp. 1-16 ◽  
Author(s):  
Viet Le ◽  
Luca Caracoglia
Keyword(s):  
Wind Tunnel ◽  
Flow Field ◽  
Stationary Flow ◽  
Small Scale ◽  
Flow Device

Acoustic and aerodynamic design and characterization of a small-scale aeroacoustic wind tunnel

2009 ◽  
Vol 70 (8) ◽  
pp. 1073-1080 ◽  
Author(s):  
Ennes Sarradj ◽  
Christoph Fritzsche ◽  
Thomas Geyer ◽  
Jens Giesler
Keyword(s):  
Wind Tunnel ◽  
Small Scale ◽  
Aerodynamic Design

scholarly journals Reynolds number and wind tunnel wall effects on the flow field around a generic UHBR engine high-lift configuration

2020 ◽  
Vol 11 (4) ◽  
pp. 1009-1023 ◽  
Author(s):  
Junaid Ullah ◽  
Aleš Prachař ◽  
Miroslav Šmíd ◽  
Avraham Seifert ◽  
Vitaly Soudakov ◽  
...  
Keyword(s):  
Reynolds Number ◽  
Wind Tunnel ◽  
Flow Field ◽  
Test Section ◽  
Large Scale ◽  
Scale Model ◽  
Small Scale ◽  
Wall Effects ◽  
Tunnel Wall ◽  
High Lift

Abstract RANS simulations of a generic ultra-high bypass ratio engine high-lift configuration were conducted in three different environments. The purpose of this study is to assess small scale tests in an atmospheric closed test section wind tunnel regarding transferability to large scale tests in an open-jet wind tunnel. Special emphasis was placed on the flow field in the separation prone region downstream from the extended slat cut-out. Validation with wind tunnel test data shows an adequate agreement with CFD results. The cross-comparison of the three sets of simulations allowed to identify the effects of the Reynolds number and the wind tunnel walls on the flow field separately. The simulations reveal significant blockage effects and corner flow separation induced by the test section walls. By comparison, the Reynolds number effects are negligible. A decrease of the incidence angle for the small scale model allows to successfully reproduce the flow field of the large scale model despite severe wind tunnel wall effects.

Characterization of plenum spectra in an arcjet wind tunnel

10.2514/3.902 ◽  
1997 ◽  
Vol 11 ◽  
pp. 339-345
Author(s):  
James P. Sawyer ◽  
S. Rao ◽  
Mohammad A. Rob ◽  
Larry H. Mack ◽  
Sivaram Arepalli ◽  
...  
Keyword(s):  
Wind Tunnel

Generation and Characterization of High Enthalpy CO2 Flow by Laser Driven Plasma Wind Tunnel

2013 ◽  
Author(s):  
Makoto Matsui ◽  
Shingo Yoneda ◽  
Satoshi Nomura ◽  
Yoshiki Yamagiwa ◽  
Kimiya Komurasaki ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
High Enthalpy ◽  
Co2 Flow

Optical and Chemical Characterization of Aerosols Emitted from Coal, Heavy and Light Fuel Oil, and Small-Scale Wood Combustion

2013 ◽  
Vol 48 (1) ◽  
pp. 827-836 ◽  
Author(s):  
Anna K. Frey ◽  
Karri Saarnio ◽  
Heikki Lamberg ◽  
Fanni Mylläri ◽  
Panu Karjalainen ◽  
...  
Keyword(s):  
Chemical Characterization ◽  
Fuel Oil ◽  
Small Scale ◽  
Wood Combustion

Characteristic model-based adaptive control for cryogenic wind tunnels

2020 ◽  
pp. 014233122096065
Author(s):  
Chenhui Yu ◽  
Fei Liao ◽  
Haibo Ji ◽  
Wenhua Wu
Keyword(s):  
Reynolds Number ◽  
Wind Tunnel ◽  
Flow Field ◽  
Control Problem ◽  
Mimo System ◽  
Adaptive Controller ◽  
Characteristic Model ◽  
Model Based ◽  
Field Control ◽  
Cryogenic Wind Tunnel

With the increasing requirement of Reynolds number simulation in wind tunnel tests, the cryogenic wind tunnel is considered as a feasible method to realize high Reynolds number. Characteristic model-based adaptive controller design method is introduced to flow field control problem of the cryogenic wind tunnel. A class of nonlinear multi-input multi-output (MIMO) system is given for theoretical research that is related to flow field control of the cryogenic wind tunnel. The characteristic model in the form of second-order time-varying difference equations is provided to represent the system. A characteristic model-based adaptive controller is also designed correspondingly. The stability analysis of the closed loop system composed of the characteristic model or the exact discrete-time model and the proposed controller is investigated respectively. Numerical simulation is presented to illustrate the effectiveness of this control method. The modeling and control problem based on characteristic model method for a class of MIMO system are studied and first applied to the cryogenic wind tunnel control field.

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