THE EFFECTS OF SOME TERRAIN ON WIND CHARACTERISTICS IN STRONG WINDS

强风中某些地形对风特性的影响

• 批准号: 09450211
• 负责人: MAEDA Junji
• 金额: $ 3.52万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09450211/
• 关键词: wind measurement; wind distribution; wind area measurement; local wind; wind tunnel test; effects of terrain; LSD method; 局所風

By some wind distribution analyses using a network system of wind measurement in Kyushu, which we call NeWMeK, the following results are obtained about the effects of topography.1. The system, which can show the characteristics of the strong wind distribution in the sight, was developed utilizing the counter map of wind distribution using the observation data of 121 sites of NeWMeK. As an example of a local area where peculiar strong wind characteristics is shown, it was verified that the west district of Fukuoka City showed a strong gust factor only for the south wind direction.2. Considering the wind direction the 121 observation sites of NeWMeK are roughly classified into the following divisions according to the terrain using the digital map information data (50m mesh) : (1) flat, (2) foothill (downward), (3) foothill (upward), (4) inclined plane (downward), (5) inclined plane (upward), (6) summit of a mountain (parallel), (7) summit of a mountain (cross), (8) valley (parallel), and … More (9) valley (cross.)3. The installation altitudes of the anemometers of NeWMeK sites vary within the range of 30-190m high. To arrange the height to 30m, the correction to the wind speeds was estimated considering the terrain and the wind directions. However a big change was not seen in whole wind distribution before and after arranging the height.4. In the case that the virtual constant wind blows to the whole of Kyushu, the rate of increase of local wind were estimated by the LSD method and the map of the virtual wind distribution were visualized. It is found that the map was almost corresponding to the situations of the wind distributions at non-typhoon. However it was confirmed that this method couldn't apply to some sites.5. The aerodynamic properties of a pulse type windmill anemometer in pulsation flows using a wind tunnel is discussed. It is found that the pulsation period and the attack angles of wind influence strongly on the measured wind speeds by the pulse type windmill anemometer. It is certificated that the responsibility of the anemometer is insufficient over ten degrees of the attack angle of wind. Less

通过使用九州地区的风测量网络系统（我们称之为NeWMeK）进行风分布分析，获得了以下关于地形影响的结果.该系统利用121个观测点的观测资料，利用风场分布反图，开发了一套能在视景中显示强风分布特征的系统。作为显示出特殊强风特征的局部地区的例子，确认了福冈市西区仅在南风方向显示出强阵风因子。2.考虑到风向，利用数字地图信息数据，将NeWMeK的121个观测点按地形大致分为以下几个分区（50米目）：（1）平坦，（2）山麓（向下），（3）山麓（向上），（4）斜面（向下），（5）斜面（向上），（6）山顶（平行），（7）山顶（交叉），（8）山谷（平行），以及 ...更多信息 (9)谷（十字）3. NeWMeK站点风速计的安装高度在30- 190 m之间变化。为了将高度设置为30 m，考虑地形和风向估计了风速的修正。而设置高度前后，整个风场分布没有明显变化.在虚拟恒定风吹向整个九州的情况下，通过LSD方法估计局部风的增加率，并可视化虚拟风分布图。结果表明，该图与非台风时的风场分布情况基本一致。但经证实，该方法不适用于某些站点.本文利用风洞试验研究了脉动气流中脉冲式风车风速计的气动特性。研究发现，脉动风的脉动周期和攻角对脉冲式风车风速计测得的风速有很大的影响。经验证，风速计在风攻角大于10度时，其响应能力不足。少

项目成果

N. Ishida, J. Maeda, et al.: "Some wind characteristics of topography using NewMek data"Journal of Wind Engineering. No. 71. 29-30 (1997)

N. Ishida、J. Maeda 等人：“使用 NewMek 数据的地形的一些风特征”风工程学报。

石田伸幸: "丘陵地形に着目した九州地区内の強風時における増速域の特定に関する研究"第15回風工学シンポジウム論文集. 15. 49-54 (1998)

石田信之：“以丘陵地形为中心的九州地区强风时速度增加区域的识别研究”第15届风工程学会论文集15. 49-54（1998）。

本田 誠: "福岡市西部域の強風増速特性に関する考察(その2)"日本風工学会誌. 79. 19-20 (1999)

本田诚：“福冈市西部强风速增强特性研究（第2部分）”日本风工程学报79. 19-20（1999）。

楠木貴博: "福岡市西部地区の強風特性に関する実験的考察-今宿地区の風向特性-"日本建築学会九州支部報告. 39(印刷中). (2000)

Takahiro Kusunoki：“福冈市西区强风特性的实验研究-今宿地区的风向特性”日本建筑学会九州分会报告39（出版中）。

S. Ebihara, M. Matsunaga, et al.: "The Effect of Attack Angles to a Pulse Type Windmill Anemometer in Pulsation Flows"Journal of Wind Engineering. No. 79. 95-96 (1999)

S. Ebihara、M. Matsunaga 等人：“脉动流中攻角对脉冲型风车风速计的影响”风工程学报。