Numerical Investigation about Optimal Design of Open-Jet Rectangular Test Section in Low Speed Wind Tunnel

Abstract

Abstract: In order improve flow quality of the specific open-jet test section, the design technology of a certain low speed wind tunnel open-jet test section was studied using computational fluid dynamics (CFD). It presents the control equations and boundary conditions for numerical simulation. Then the details of numerical results about the different configurations were given. Comparing with full open-jet test section, the velocity uniformity of model region is evidently improved by use of collector. Honeycomb and screens have profound function on the velocity field such as uniformity, direction field and turbulence level. Further investigation on the size of test section and collector indicates that the flow quality of model region is significantly improved when several measures are implemented such as extending the entrance length before test section, increasing the test section caliber and the changing location and size of the collector. Combination of satisfactory parameters, which can produce a more uniform velocity profile to arrive at the expected level, was obtained based on numerical results.

Key words: low speed, wind tunnel, openjet test section, flow characteristic, numerical simulation, optimal design

CONG Cheng-Hua-a, b , REN Ze-Bin-b, PENG Qiang-a, b . Numerical Investigation about Optimal Design of Open-Jet Rectangular Test Section in Low Speed Wind Tunnel[J]. Journal of Shanghai Jiaotong University, 2012, 46(08): 1320-1327.

References

［1］Duell E. Recent advances in large scale aeroacoustic wind tunnels［C］

∥ 8th AIAA CEAS Aeroacoustic Conference and Exhibit. Colorado: American Institute of Aeronautics and Astronautics,2002:AIAA 20022503.
［2］Chong T P. Design and performance of an open jet wind tunnel for aeroacoustic measurement［J］. Applied Acoustics, 2009, 70: 605614.
［3］张震宇，明晓. 低速风洞设计中的导流片损失问题［J］. 空气动力学学报, 2001, 19(1):5661.
ZHANG Zhenyu, MING Xiao. Research on energy loss of guide vane in lowspeed wind tunnel［J］ . Acta Aerodynamica Sinica, 2001, 19(1):5661.
［4］李强. 上海大学低湍流度低速风洞及气动设计［J］. 上海大学学报, 2007, 13(2):203207.
LI Qiang. Aerodynamic and structural design of low velocity and low turbulence wind tunnel ［J］. Journal of Shanghai University, 2007, 13(2):203207.
［5］李启良. 计算流体力学在气动声学风洞设计中的应用［J］. 空气动力学学报, 2009, 27(3):373377.
LI Qiliang. Application of CFD for the design of aeroacoustic wind tunnel［J］. Acta Aerodynamica Sinica, 2009, 27(3):373377.
［6］丛成华, 陈振华, 彭强. 跨超声速风洞大开角段设计技术研究［J］. 空气动力学学报, 2011, 29(1):8590.
CONG Chenghua, CHEN Zhenhua, PENG Qiang. Study report of design technology of transonic wind tunnel’s wide angle diffuser［J］. Acta Aerodynamica Sinica, 2011, 29(1):8590.
［7］丛成华, 廖达雄, 陈吉明. 跨声速风洞第二喉道性能计算［J］. 航空动力学报, 2010, 25(9):20502056.
CONG Chenghua, LIAO Daxiong, CHEN Jiming. Numerical investigation on performance of second throat in transonic wind tunnel［J］. Journal of Aerospace Power, 2010, 25(9):20502056.
［8］丛成华,彭强,王海锋.槽壁试验段低超声速流场特性数值模拟［J］.航空学报,2010,31(12):23022308.
CONG Chenghua, PENG Qiang, WANG Haifeng. Numerical simulation on characteristics of slotted test section of low supersonic field［J］. Acta Aeronautica et Astronautica Sinica, 2010, 31(12):23022308.
［9］Deo R C. The influence of nozzleexit geometric profile on statistical properties of a turbulent plane jet［J］. Experimental Thermal and Fluid Science, 2007, 32:545559.
［10］平浚. 射流理论基础及应用［M］. 北京：宇航出版社，1995.
［11］Mi J. Centreline mixing characteristics of jets from nine differently shaped nozzles［J］. Experiments in Fluids, 2000, 28:9394.
［12］Sahlin A. Design of guide vanes for minimizing the pressure loss in sharp bends［J］. Physics Fluids A, 1991, 3(8):19341941.
［13］蒋平,郭印诚,张会强.入口扰动频率对矩形射流影响的大涡模拟［J］.计算力学学报, 2007,24(1):714.
JIANG Ping, GUO Yincheng, ZHANG Huiqiang. Large eddy simulation of rectangular jets on the effects of various inlet disturbance frequencies［J］. Chinese Journal of Computational Mechanics, 2007, 24(1):714.
［14］Scheiman J. Comparison of experimental and theoretical turbulence reduction from screens, honeycomb and honeycombscreen combinations［J］. Journal of Aircraft, 1981, 18(8):638643.

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