TY - JOUR
T1 - Field test and numerical reconstitution of natural winds at the tunnel entrance section of high-speed railway
AU - Yang, Weichao
AU - Liu, Yikang
AU - Deng, E.
AU - Wang, Youwu
AU - He, Xuhui
AU - Lei, Mingfeng
AU - Zou, Yunfeng
N1 - Funding Information:
This work was funded by the National Natural Science Foundation of China [Grant numbers 51978670 and U1934209], the National Outstanding Youth Science Fund Project of National Natural Science Foundation of China [Grant number 51925808], the Research Grants Council, University Grants Committee of the Hong Kong Special Administrative Region (SAR), China [Grant number R-5020–18], the Innovation and Technology Commission of the Hong Kong SAR Government [Grant number K-BBY1] and The Hong Kong Polytechnic University's Postdoc Matching Fund Scheme [Grant number 1-W21Q].
Publisher Copyright:
© 2022, Emerald Publishing Limited.
PY - 2022
Y1 - 2022
N2 - Purpose: The purpose of this paper is to understand the natural wind field characteristics of the tunnel entrance section and analyzing the aerodynamic performance of high-speed railway trains (HSRTs) under natural winds. Design/methodology/approach: Three typical tunnel entrance section sites, namely, tunnel–bridge in a dry canyon (TBDC), tunnel–bridge in a river canyon (TBRC) and tunnel–flat ground (TF), are selected to conduct a continuous wind field measurement. Based on the measured wind characteristics, the natural winds of the TBDC and TF sites are reconstituted and imported into the two corresponding full-scale computational fluid dynamics models. The aerodynamic loads of the HSRT running on TBDC and TF with reconstituted winds are simply analyzed. Findings: The von Kármán spectrum can be used to describe the wind field at the tunnel entrance section. In the reconstituted natural wind condition, a time-varying feature of wind speed distribution and leeward side vortex around the HSRT caused by the wind speed fluctuation is found. The fluctuating amplitude of aerodynamic loads at the TBDC infrastructure is up to 97.9% larger than that at the TF infrastructure. Originality/value: The natural wind characteristics at tunnel entrance sections on the high-speed railway are first measured and analyzed. A numerical reconstitution scheme considering the temporal and spatial variation of natural wind speed is proposed and verified based on field measurement results. The aerodynamic performance of an HSRT under reconstituted natural winds is first investigated.
AB - Purpose: The purpose of this paper is to understand the natural wind field characteristics of the tunnel entrance section and analyzing the aerodynamic performance of high-speed railway trains (HSRTs) under natural winds. Design/methodology/approach: Three typical tunnel entrance section sites, namely, tunnel–bridge in a dry canyon (TBDC), tunnel–bridge in a river canyon (TBRC) and tunnel–flat ground (TF), are selected to conduct a continuous wind field measurement. Based on the measured wind characteristics, the natural winds of the TBDC and TF sites are reconstituted and imported into the two corresponding full-scale computational fluid dynamics models. The aerodynamic loads of the HSRT running on TBDC and TF with reconstituted winds are simply analyzed. Findings: The von Kármán spectrum can be used to describe the wind field at the tunnel entrance section. In the reconstituted natural wind condition, a time-varying feature of wind speed distribution and leeward side vortex around the HSRT caused by the wind speed fluctuation is found. The fluctuating amplitude of aerodynamic loads at the TBDC infrastructure is up to 97.9% larger than that at the TF infrastructure. Originality/value: The natural wind characteristics at tunnel entrance sections on the high-speed railway are first measured and analyzed. A numerical reconstitution scheme considering the temporal and spatial variation of natural wind speed is proposed and verified based on field measurement results. The aerodynamic performance of an HSRT under reconstituted natural winds is first investigated.
KW - Aerodynamic loads
KW - High-speed railway train
KW - Natural wind characteristics
KW - Numerical reconstitution
KW - Tunnel entrance section
UR - http://www.scopus.com/inward/record.url?scp=85135577447&partnerID=8YFLogxK
U2 - 10.1108/HFF-06-2022-0381
DO - 10.1108/HFF-06-2022-0381
M3 - Journal article
AN - SCOPUS:85135577447
SN - 0961-5539
JO - International Journal of Numerical Methods for Heat and Fluid Flow
JF - International Journal of Numerical Methods for Heat and Fluid Flow
ER -