Optimum nose shape of a front-rear symmetric train for the reduction of the total aerodynamic drag

For a high-speed train, the same power car is used as the first car and as the last car in a reverse direction simultaneously. Therefore, the previously optimized nose shape, considering only the first car position, is not well adopted in the last car position of a front-rear symmetric train in view of the aerodynamic drag. The three-dimensional nose shape optimization of a front-rear symmetric train is conducted to minimize the total aerodynamic drag of the entire train using CFD. The 3-D nose model is constructed by the vehicle modeling function with the optimized area distribution to minimize the micro-pressure wave. It is revealed that the total aerodynamic drag of the optimum shape for the entire train is reduced by 23.0% when compared to that of the conventionally optimized shape only for the first car of the symmetric train.

[1]  Gerd Matschke,et al.  Effects of experimental bogie fairings on the aerodynamic drag of the ETR 500 high speed train * , 2001 .

[2]  P. G. Huang,et al.  Multi Objective Aerodynamic Shape Optimization of High Speed Train Nose Using Adaptive Surrogate Model , 2010 .

[3]  Felix Schmid,et al.  A review of methods to measure and calculate train resistances , 2000 .

[4]  Guowei Yang,et al.  Shape Optimization of High-Speed Train with the Speed of 500kph , 2012 .

[5]  Sinisa Krajnovic,et al.  LES study of the influence of the nose shape and yaw angles on flow structures around trains , 2010 .

[6]  THE INFLUENCE OF THE NOSE SHAPE OF HIGH SPEED TRAINS ON THE AERODYNAMIC COEFFICIENTS , 2001 .

[7]  Guowei Yang,et al.  The Influence of Different Cross-Section Shapes of Train Body on Aerodynamic Performance , 2012 .

[8]  Dong-Ho Lee,et al.  Fundamental studies on free stream acceleration effect on drag force in bluff bodies , 2011 .

[9]  Je Hyun Baek,et al.  An Experimental Study of Aerodynamic drag on High-speed Train , 2000 .

[10]  Christopher Baker,et al.  FLOW AND DISPERSION IN GROUND VEHICLE WAKES , 2001 .

[11]  Stuart E. Rogers,et al.  Upwind differencing scheme for the time-accurate incompressible Navier-Stokes equations , 1990 .

[12]  Dong-Ho Lee,et al.  Study on the unsteady wakes past a square cylinder near a wall , 2005 .

[13]  V. R. Joseph,et al.  ORTHOGONAL-MAXIMIN LATIN HYPERCUBE DESIGNS , 2008 .

[14]  B. Kulfan.  Universal Parametric Geometry Representation Method , 2008 .

[15]  전용희,et al.  Application of the Robust and Reliability-Based Design Optimization to the Aircraft Wing Design , 2006 .

[16]  Sinisa Krajnovic,et al.  Improvement of aerodynamic properties of high-speed trains by shape optimization and flow control , 2008 .

[17]  Garret N. Vanderplaats,et al.  Numerical optimization techniques for engineering design , 1999 .

[18]  G Carpenter,et al.  The application of Navier-Stokes computations to the design of high-speed, low-drag magnetically levitated (Maglev) vehicle shapes , 1995 .

[19]  Thomas J. Santner,et al.  Design and analysis of computer experiments , 1998 .

[20]  F. Monnoyer,et al.  Aerodynamic optimization of railway motor coaches , 2006 .

[21]  Hyeok-bin Kwon,et al.  Wind tunnel experiments on Korean high-speed trains using various ground simulation techniques , 2001 .

[22]  Dong-Ho Lee,et al.  Multi-Objective Optimization of High-Speed Train Nose Shape Using the Vehicle Modeling Function , 2010 .

[23]  Ali Asghar Atai,et al.  Application of impulse damper in control of a chaotic friction-induced vibration , 2011 .

[24]  Toshiaki Setoguchi,et al.  Aerodynamics of high-speed railway train , 2002 .

[25]  이동호,et al.  공기저항과 미기압파 저감을 위한 고속전철 전두부형상의 최적화설계 ( Nose Shape Optimization of the High-speed Train to Reduce the Aerodynamic drag and Micro-pressure Wave ) , 2001 .

[26]  Kyu-Hong Kim,et al.  Optimal cross-sectional area distribution of a high-speed train nose to minimize the tunnel micro-pressure wave , 2010 .

[27]  John E. Bussoletti,et al.  "Fundamental" Parameteric Geometry Representations for Aircraft Component Shapes , 2006 .

[28]  Guowei Yang,et al.  Aerodynamic design for China new high-speed trains , 2012 .

[29]  Takeshi Kurita,et al.  Noise Measurement Results of Shinkansen High-Speed Test Train (FASTECH360S,Z) , 2008 .

[30]  B. Kulfan.  A Universal Parametric Geometry Representation Method - "CST" , 2007 .

[31]  Dong-Ho Lee,et al.  Development of a Vehicle Modeling Function for Three-Dimensional Shape Optimization , 2009 .

[32]  구요천.  Two-step multi-objective nose shape optimization of high-speed train using the vehicle modeling function , 2009 .

[33]  Christopher Baker,et al.  The flow around high speed trains , 2010 .

[34]  Tatsuo Maeda,et al.  WIND TUNNEL TESTS TO REDUCE AERODYNAMIC DRAG OF TRAINS BY SMOOTHING THE UNDER-FLOOR CONSTRUCTION , 2001 .

[35]  Dong-Ho Lee,et al.  Passive reduction of large pressure variation for a high-speed express train in a narrow tunnel using an extra dummy tunnel duct , 2010 .

[36]  M. E. Johnson,et al.  Minimax and maximin distance designs , 1990 .

[37]  P. K. Sweby,et al.  High resolution TVD schemes using flux limiters , 1985 .

[38]  Richard J. Beckman,et al.  A Comparison of Three Methods for Selecting Values of Input Variables in the Analysis of Output From a Computer Code , 2000, Technometrics.

[39]  Dong Ho Lee,et al.  Unsteady aerodynamic loads on high speed trains passing by each other , 2000 .

[40]  Dong-Ho Lee,et al.  Experimental Study on Aerodynamic Drag Characteristics by Train Underbody Shape Variation , 2012 .

[41]  Dong-Ho Lee,et al.  Strongly Coupled Method for 2DOF Flutter Analysis , 2006 .

[42]  Dong-Ho Lee,et al.  An implementation of the robust inviscid wall boundary condition in high-speed flow calculations , 2001 .

[43]  M Ito.  Improvement to the aerodynamic characteristics of Shinkansen rolling stock , 2000 .