Surrogate modelling of the high-static-pressure fan for high-speed trains and its dynamic airtightness analysis using CFD

Yibin Lu; Tiantian Wang; Xiaohui Xiong; Hengkui Li; Fangcheng Shi; Chen Jiang

doi:10.1016/j.buildenv.2023.111022

Surrogate modelling of the high-static-pressure fan for high-speed trains and its dynamic airtightness analysis using CFD

Yibin Lu
, Tiantian Wang^*
, Xiaohui Xiong
, Hengkui Li
, Fangcheng Shi
, Chen Jiang

^*Corresponding author for this work

Department of Architecture and Civil Engineering

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

4 Citations (Scopus)

Abstract

Pressure protection devices are installed in ventilation systems to coordinate the air quality and pressure fluctuations inside high-speed trains, wherein the active pressure protection device (APPD) that adopts high-static pressure fans (HSPFs) is superior in maintaining favourable air quality. However, it is complicated to model an actual channel of an HSPF, and its airtightness performance, which could cause ear discomfort for occupants, has been unclear until now. In this study, a surrogate model based on a porous medium is presented to simulate HSPF operations. This model is validated by reference values and field experiments, which can accurately represent its inhibition effect on pressure transmission inside and outside the vehicle. Based on the proposed model, the exterior pressure fluctuation parameters, mode of fan operation and fan performance curve were selected to analyse the dynamic sealing capability of the HSPF. The results showed that the mode of HSPF_on can effectively restrain the pressure transmission compared to the normal fan and the mode of HSPF_off, whose dynamic airtightness index (τ_dyn) is scarcely affected by the external pressure fluctuation, with a value between 20 s and 23 s. In addition, improving the fan performance can enhance the dynamic airtightness of the HSPF, and τ_dyn increases by approximately 3.5 s with the static pressure value rising by 1000 Pa. Moreover, a new method for investigating the dynamic airtightness of HSPFs is provided in this study, and this method can be used to guide the airtightness design of APPDs relying on HSPFs. © 2023 Elsevier Ltd. All rights reserved.

Original language	English
Article number	111022
Journal	Building and Environment
Volume	247
Online published	10 Nov 2023
DOIs	https://doi.org/10.1016/j.buildenv.2023.111022
Publication status	Published - 1 Jan 2024

Funding

Tiantian Wang would like to acknowledge the financial support received from the National Natural Science Foundation of China (Grant numbers 52078199 & 52322215 ), the China National Railway Group Limited (Grant numbers P2021J036 & N2021J029 ) and the Young Elite Scientists Sponsorship Program by CAST (Grant number 2020QNRC001 ). Yibin Lu wishes to acknowledge the financial support of the Self-exploration and Innovation Project for Postgraduates of Central South University (Grant number 2022ZZTS0649 ).

Research Keywords

High-speed train
High-static-pressure fan
Indoor air environment
Pressure comfort
Surrogate model

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10.1016/j.buildenv.2023.111022

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@article{b890643441564c329defc3b17ea73990,

title = "Surrogate modelling of the high-static-pressure fan for high-speed trains and its dynamic airtightness analysis using CFD",

abstract = "Pressure protection devices are installed in ventilation systems to coordinate the air quality and pressure fluctuations inside high-speed trains, wherein the active pressure protection device (APPD) that adopts high-static pressure fans (HSPFs) is superior in maintaining favourable air quality. However, it is complicated to model an actual channel of an HSPF, and its airtightness performance, which could cause ear discomfort for occupants, has been unclear until now. In this study, a surrogate model based on a porous medium is presented to simulate HSPF operations. This model is validated by reference values and field experiments, which can accurately represent its inhibition effect on pressure transmission inside and outside the vehicle. Based on the proposed model, the exterior pressure fluctuation parameters, mode of fan operation and fan performance curve were selected to analyse the dynamic sealing capability of the HSPF. The results showed that the mode of HSPF\_on can effectively restrain the pressure transmission compared to the normal fan and the mode of HSPF\_off, whose dynamic airtightness index (τdyn) is scarcely affected by the external pressure fluctuation, with a value between 20 s and 23 s. In addition, improving the fan performance can enhance the dynamic airtightness of the HSPF, and τdyn increases by approximately 3.5 s with the static pressure value rising by 1000 Pa. Moreover, a new method for investigating the dynamic airtightness of HSPFs is provided in this study, and this method can be used to guide the airtightness design of APPDs relying on HSPFs. {\textcopyright} 2023 Elsevier Ltd. All rights reserved.",

keywords = "High-speed train, High-static-pressure fan, Indoor air environment, Pressure comfort, Surrogate model",

author = "Yibin Lu and Tiantian Wang and Xiaohui Xiong and Hengkui Li and Fangcheng Shi and Chen Jiang",

year = "2024",

month = jan,

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doi = "10.1016/j.buildenv.2023.111022",

language = "English",

volume = "247",

journal = "Building and Environment",

issn = "0360-1323",

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TY - JOUR

T1 - Surrogate modelling of the high-static-pressure fan for high-speed trains and its dynamic airtightness analysis using CFD

AU - Lu, Yibin

AU - Wang, Tiantian

AU - Xiong, Xiaohui

AU - Li, Hengkui

AU - Shi, Fangcheng

AU - Jiang, Chen

PY - 2024/1/1

Y1 - 2024/1/1

N2 - Pressure protection devices are installed in ventilation systems to coordinate the air quality and pressure fluctuations inside high-speed trains, wherein the active pressure protection device (APPD) that adopts high-static pressure fans (HSPFs) is superior in maintaining favourable air quality. However, it is complicated to model an actual channel of an HSPF, and its airtightness performance, which could cause ear discomfort for occupants, has been unclear until now. In this study, a surrogate model based on a porous medium is presented to simulate HSPF operations. This model is validated by reference values and field experiments, which can accurately represent its inhibition effect on pressure transmission inside and outside the vehicle. Based on the proposed model, the exterior pressure fluctuation parameters, mode of fan operation and fan performance curve were selected to analyse the dynamic sealing capability of the HSPF. The results showed that the mode of HSPF_on can effectively restrain the pressure transmission compared to the normal fan and the mode of HSPF_off, whose dynamic airtightness index (τdyn) is scarcely affected by the external pressure fluctuation, with a value between 20 s and 23 s. In addition, improving the fan performance can enhance the dynamic airtightness of the HSPF, and τdyn increases by approximately 3.5 s with the static pressure value rising by 1000 Pa. Moreover, a new method for investigating the dynamic airtightness of HSPFs is provided in this study, and this method can be used to guide the airtightness design of APPDs relying on HSPFs. © 2023 Elsevier Ltd. All rights reserved.

AB - Pressure protection devices are installed in ventilation systems to coordinate the air quality and pressure fluctuations inside high-speed trains, wherein the active pressure protection device (APPD) that adopts high-static pressure fans (HSPFs) is superior in maintaining favourable air quality. However, it is complicated to model an actual channel of an HSPF, and its airtightness performance, which could cause ear discomfort for occupants, has been unclear until now. In this study, a surrogate model based on a porous medium is presented to simulate HSPF operations. This model is validated by reference values and field experiments, which can accurately represent its inhibition effect on pressure transmission inside and outside the vehicle. Based on the proposed model, the exterior pressure fluctuation parameters, mode of fan operation and fan performance curve were selected to analyse the dynamic sealing capability of the HSPF. The results showed that the mode of HSPF_on can effectively restrain the pressure transmission compared to the normal fan and the mode of HSPF_off, whose dynamic airtightness index (τdyn) is scarcely affected by the external pressure fluctuation, with a value between 20 s and 23 s. In addition, improving the fan performance can enhance the dynamic airtightness of the HSPF, and τdyn increases by approximately 3.5 s with the static pressure value rising by 1000 Pa. Moreover, a new method for investigating the dynamic airtightness of HSPFs is provided in this study, and this method can be used to guide the airtightness design of APPDs relying on HSPFs. © 2023 Elsevier Ltd. All rights reserved.

KW - High-speed train

KW - High-static-pressure fan

KW - Indoor air environment

KW - Pressure comfort

KW - Surrogate model

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U2 - 10.1016/j.buildenv.2023.111022

DO - 10.1016/j.buildenv.2023.111022

M3 - RGC 21 - Publication in refereed journal

AN - SCOPUS:85181658300

SN - 0360-1323

VL - 247

JO - Building and Environment

JF - Building and Environment

M1 - 111022

ER -

Surrogate modelling of the high-static-pressure fan for high-speed trains and its dynamic airtightness analysis using CFD

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