Speed-up effect of horizontal wind velocities on two adjacent hills

SHEN Guohui; YAO Jianfeng; WANG Chang; JIN Renyun; LOU Wenjuan

doi:10.7638/kqdlxxb-2018.0109

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Speed-up effect of horizontal wind velocities on two adjacent hills

更新时间：2026-05-28

- Speed-up effect of horizontal wind velocities on two adjacent hills
- Vol. 38, Issue 2, Pages: 274-280(2020)
- 作者机构：
  
  1. 浙江大学建筑工程学院,杭州,310058
  2. 国网浙江省电力有限公司,杭州,310007
- 作者简介：
- 基金信息：
- DOI：10.7638/kqdlxxb-2018.0109
  CLC： TU312
- Published：2020
- 稿件说明：
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沈国辉, 姚剑锋, 王昌, 金仁云, 楼文娟. 双山情况下水平风的加速效应[J]. 空气动力学学报, 2020, 38(2): 274-280.

SHEN Guohui, YAO Jianfeng, WANG Chang, et al. Speed-up effect of horizontal wind velocities on two adjacent hills[J]. 2020, 38(2): 274-280.
沈国辉, 姚剑锋, 王昌, 金仁云, 楼文娟. 双山情况下水平风的加速效应[J]. 空气动力学学报, 2020, 38(2): 274-280. DOI： 10.7638/kqdlxxb-2018.0109.

SHEN Guohui, YAO Jianfeng, WANG Chang, et al. Speed-up effect of horizontal wind velocities on two adjacent hills[J]. 2020, 38(2): 274-280. DOI： 10.7638/kqdlxxb-2018.0109.

摘要

为获得双山情况水平风的加速效应，采用计算流体动力学（CFD）方法对左右排列、前后排列和斜列情况双山水平风的加速比和分布特征进行了研究，通过典型工况风洞试验验证了CFD模拟的准确性。研究表明：山体上水平风加速比的分布特征为山前、山顶和山后分别是减速区、最大加速位置和尾流区；左右排列双山的加速比随着山体间距的减少而增加，双山间距为0 m时加速比最大，单山情况加速比最小，单山相当于双山间距无穷远情况；前后紧密排列双山情况下，前山对后山有遮挡效应，后山使得前山的水平风速略微降低，水平风速加速比呈现单山前山后山的规律，但三者差别较小；斜列情况下风向角对山顶水平风加速比的影响较小；山体的CFD计算结果与澳大利亚/新西兰规范比较接近，中国规范关于山体加速比的规定比较保守。

Abstract

In order to study the horizontal wind speed-up effect on two adjacent hills

computational fluid dynamics (CFD) simulation was employed and systematic analysis was made. The speed-up ratios of the two hills in parallel

tandem

and staggered arrangement were obtained and their distribution characteristics were investigated. The speed-up ratios of typical cases obtained from the CFD simulations were compared with those obtained from the wind tunnel tests in order to validate the present CFD simulation. Results show that

typical characteristics of horizontal wind speed-up ratio on a hill are that the front part

hill crest and rear part are the deceleration zone

the maximum acceleration position and the wake zone

respectively. The speed-up ratios of the two adjacent hills in tandem arrangement increase with the decrease of the hill distance and reach their maximum values when the hill distance is zero. The speed-up ratios of the isolated hill are less than those of the two adjacent hills with arbitrary hill distance

indicating that the isolated hill case is equivalent to the two hills with infinite hill distance. For two adjacent hills in gapless staggered arrangement

the front hill has shielding effect on the rear hill to some extend

and the existence of the rear hill slightly reduces the wind velocity of the front hill. Therefore

the speed-up ratios of the front hill are bigger than those on the rear hill and smaller than those on the isolated hill; however

the discrepancy between them is insignificant. The speed-up ratios of the hills obtained by the CFD simulation are close to those obtained from Australian and New Zealand Code

and the regulation in the Chinese Code regarding the horizontal speed-up ratio is relatively conservative.

关键词

Keywords

references

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