|Table of Contents|

Air-pumping effect analysis for brake disc of high-speed train(PDF)

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2014年02期
Page:
34-40,74
Research Field:
载运工具运用工程
Publishing date:

Info

Title:
Air-pumping effect analysis for brake disc of high-speed train
Author(s):
ZUO Jian-yong LUO Zhuo-jun
Institute of Railway and Urban Mass Transit, Tongji University, Shanghai 201804, China
Keywords:
high-speed train brake disc air-pumping effect air-pumping power consumption air flow field numerical simulation
PACS:
U270.1
DOI:
-
Abstract:
To study the air-pumping characteristics of brake disc during train operation, the finite element models including vehicle, rail, brake disc and related air flow field were put forward. The air-pumping power consumption of brake disc was calculated, and its effect on traction power was analyzed by using dynamic grid and flow-solid conjugation simulation method. Taking a 8-unit high-speed train composed of 4 motor cars and 4 trailers running at 300 km·h-1 as an example, the air-pumping effect of brake disc was simulated and compared. Simulation result indicates that the air-pumping power consumption of brake disc is in proportion to train running speed. The air-pumping power consumption of each car is about 54-70 kW. The air-pumping torque, independent of installation position of brake disc, is mainly influenced by the rotational velocity of brake disc. The proportion of air-pumping power consumption of brake disc reduces with the increase of train running velocity. When train running velocity increases from 200 km·h-1 to 400 km·h-1, the proportion of air-pumping power consumption reduces from 12% to 8%. Blocking air from the inlets of brake discs is helpful to reduce the influence of air-pumping power consumption. Taking the train running at 300 km·h-1 as an example, when the inlets of brake discs are blocked, the air-pumping power consumption of brake disc reduces from 489 kW to 68 kW, the basic resistance power consumption consumed by air-pumping power consumption reduces from 9.0% to 1.3%, so the method is effective. Obviously, it has greater realistic meanings for the cooling rib structure optimization of brake disc of high-speed train in considering the air-pumping power consumption issue. 2 tabs, 10 figs, 15 refs.

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Last Update: 2014-04-30