Experimental and numerical studies of the low speed wind tunnel DNW-NWB's open test section towards an aeroacoustic facility

2012 ◽  
Author(s):  
Vlad Ciobaca ◽  
Stefan Melber-Wilkending ◽  
Georg Wichmann ◽  
Andreas Bergmann ◽  
Albert Küpper
Keyword(s):  
Wind Tunnel ◽  
Test Section ◽  
Low Speed ◽  
Numerical Studies ◽  
Open Test ◽  
Low Speed Wind Tunnel

scholarly journals A New Method for Adjusting Setting Angle of Rotor Blade for Axial Fan in Wind Tunnel

2019 ◽  
Vol 37 (3) ◽  
pp. 580-586
Author(s):  
Xiaoli Qu ◽  
Zebin Ren ◽  
Wenguo Yang ◽  
Yuanqiang Luo ◽  
Chenghua Cong
Keyword(s):  
Wind Tunnel ◽  
Flow Velocity ◽  
Test Section ◽  
Rotor Blade ◽  
New Method ◽  
Axial Fan ◽  
Low Speed ◽  
Rotating Speed ◽  
Setting Angle ◽  
Low Speed Wind Tunnel

Combining the fan aerodynamic efficiency with the wind tunnel pressure loss coefficient, a new equation which points out the inherent relationship of the fan blade setting angle, fan rotating speed and gas flow rate in wind tunnel circuit is derived according to the two-dimensional flow theory of the axial fan rotor blades and the aerodynamic characteristics of the low speed wind tunnel. So a new method for setting angle adjustment of fan rotor blade to satisfy the fan performance at off-design point by getting the test results of fan operation parameters but without the fan total pressure rise in the low speed wind tunnel is developed. Flowing the new method, the setting angle adjusting value of fan rotor blade was provided only with the fan rotating speed and flow velocity in the test section of a low speed wind tunnel directly before the fan setting angle altered, the adjusting target was achieved by the new blade setting angle successfully and the time and cost of the wind tunnel commissioning test were saved. The test results show that, after increasing the fan rotor blade setting angle by 4.5 degrees, when the flow velocity in the wind tunnel test section reaches 60 m/s, the fan rotating speed is 570 r/min, the deviation from the predicted fan rotating speed value of 575 r/min is 0.9%. For the same test section flow velocity, the predicted value of the fan rotating speed is in a good agreement with the real value, it proves that this method is reliable and accurate in practical application.

scholarly journals An Experimental Study of Test Section Velocity Calibration for Low-Speed Wind Tunnel

2012 ◽  
Vol 40 (3) ◽  
pp. 230-236 ◽  
Author(s):  
Se-Yoon Oh ◽  
Jong-Geon Lee ◽  
Sung-Cheol Kim ◽  
Sang-Ho Kim ◽  
Seung-Ki Ahn
Keyword(s):  
Experimental Study ◽  
Wind Tunnel ◽  
Test Section ◽  
Low Speed ◽  
Velocity Calibration ◽  
Low Speed Wind Tunnel

scholarly journals Design of short low speed Göttingen type wind tunnel: CFD simulation

2018 ◽  
Vol 145 ◽  
pp. 03015
Author(s):  
Hardy Weisweiler ◽  
Jasmina Kojouharova ◽  
Roland Dückershoff
Keyword(s):  
Applied Sciences ◽  
Wind Tunnel ◽  
Test Section ◽  
Cfd Simulation ◽  
Test Chamber ◽  
Sectional Area ◽  
Cross Sectional ◽  
Low Speed ◽  
University Of Applied Sciences ◽  
Open Test

The paper is focused on design simulations by the means of commercial software for a low speed circuit wind tunnel with an open test section, recently built at the Department of Mechanical Engineering, Mechatronics and Materials Technology at THM University of Applied Sciences in Friedberg. The proposed wind tunnel has a test section with cross sectional area of 1 X 1 m2 and a length of 1.6 m. The maximum achievable speed is about 50 m/s with empty test section. The simulation had the target to propose and to verify various geometries - test chamber, tunnel contraction, diffuser etc. as well the tunnel corner including the vanes. In addition, the influence of the vanes number and their shape on the ventilator power needed and the flow velocity uniformity as well, have been subjects of the investigation. Also the ventilator type (rotational segment) impact on the flow pattern within the operational area has been scrutinized.

Design and Construction of a Low Speed Wind Tunnel

2016 ◽  
Author(s):  
Odenir de Almeida ◽  
FREDERICO CARNEVALLI DE MIRANDA ◽  
Olivio Neto ◽  
Fernanda Guimarães Saad
Keyword(s):  
Wind Tunnel ◽  
Low Speed ◽  
Low Speed Wind Tunnel ◽  
Design And Construction
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