分段式防風林耗損能量（風力）之風洞試驗

WIND TUNNEL EXPERIMENT ON WIND ENERGY LOSS OF MULTI-SECTION WINDBREAK

10.29417/JCSWC.198611_17(2).0004

江永哲(Yung-Cheh Chiang)；吳約西(Iue-Shi Wu)

分段式防風林 ； multi-section windbreak ； wind energy loss

中華水土保持學報

17卷2期（1986 / 11 / 01）

27 - 41

繁體中文

本試驗係在風洞中進行分段式防風林耗損能量（風力）之比較，尋求何種分段方法耗損能量最爲有教。以前後二段皆20.行寬，間距爲15.及10.倍H（H：模型樹高，下同）之林帶；前段10.行而後段20.行，間距爲20.，15.，10倍H之林帶及60行寬無分段之林帶等六種處理進行比較。結果以前後段皆爲20.行而間距爲15.H之二段式林帶，最具能量耗損之效果。在風速爲10. m/sec時，約可耗損輸入能量之29.4%；而風速在15. m/sec之情況下，可耗損達29.1%，平均較未分段之60.行林帶多耗損約8.5%。

The main purpose of this paper is to find the best effect of multi-section wind- break in the wind tunnel on wind energy loss. Six treatments of multi-section windbreaks were employed in this experiment. The results obtained were that the kind of both front and rear section of 20 rows and 15H (height of the model tree) interval, can get the best effect of energy loss than other treatments. When V (wind velocity) 10 m/sec, this type of multi-section windbreak can reduce 29.4% of total energy, it can reduce 29.1% of total energy while V= 15 m/sec. The average wind energy loss with this treatment is 8.5% more than that with 60 rows windbreak.