摘要
山地风场具有与平地风场截然不同的特性,为了研究平均和脉动风速在山地中的空间分布规律,进行了10个不同坡度和高度h的三维轴对称山体模型的边界层风洞试验。试验结果显示:平均风速在山顶达到最大加速,在背风面山脚达到最大减速;山体坡度越大,山顶加速效应越大,背风面山脚减速越大。脉动风速均方根值在山体迎风面和山顶均与平地风场接近,在背风面山脚增加最大,在其后5h位置,恢复与平地风场相同。根据试验结果提出了新的山地风场平均及脉动风速分布模型。
Characteristics of wind field in hilly terrain is distinct from that in flat terrain.In order to get the distribution of mean and fluctuating wind velocity in hilly terrain,wind tunnel tests including 10 3D axisymmetric hill models,with different slope and height,are finished.The results show,mean velocity are accelerated the most on the crest,and are decelerate the most at the foot of hills on leeside.The bigger the slope is,the more the acceleration and deceleration is.Root mean square of fluctuating velocity in the windward side of hills and on the crest are almost the same with that in flat terrain,while that at the foot of hills on leeside are accelerated the most.At 5h behind the foot of hills on leeside,root mean square of fluctuating velocity come back to the situation of flat terrain.According to the test results,new models on distributions of mean and fluctuating wind velocity in hilly terrain are established.
出处
《空气动力学学报》
EI
CSCD
北大核心
2011年第5期593-599,共7页
Acta Aerodynamica Sinica
基金
国家自然科学基金重大研究计划(90715024)
重庆大学研究生创新团队建设项目(200909C1017)
关键词
山地风场
加速效应
原始算法
风洞试验
风场模型
hilly terrain
speed-up effect
original guideline
wind tunnel test
wind field model
