ロケット発射時における地上風の数値風況予測の試行

摘要

When launching a space rocket, cross wind is thought to be one of maojor weather hazards since a rocket experiences wind load and drifting. To develop new types of space rocket optimally, it is essential to understand fully about wind around a launch pad and a rocket itself, considering three-dimensional airflow structure. To simulate wind, large-eddy simulation (LES) technique was applied to Tanegashima Space Center and its launch facilities, structures and buildings. In this paper, comparison evaluation is discussed based on the results from LES technique and data acquired by anemometers in 15 years and the Doppler lidar system in a month. The numerical results showed good consistent with the observational data especially in the airflow locally affected by buildings and the topographical effects.%現在，九州大学応用力学研究所と環境GIS研究所では数値風況予測技術(CFD)の開発が進められている.地理情報システム(GIS)に対応した非定常•非線形の数値風況予測モデル(Airflow Analyst®,エアフローアナリスト)もそのーつである.これは，CFDとGISの技術の融合により，都市計画，建築，土木，防災，医療，エネルギー等の様々な応用分野で気流場と拡散場を把握し，最適な意思決定の支援を目的に開発されたものである.特に，風力発電事業における適用事例が多く，数々の成果が既に報告されている.