大気対流境界層を模擬するための風洞実験

抄録

A wind tunnel simulation of the convective planetary boundary layer was performed. The temperature of a flat wind tunnel floor was increased almost uniformly up to 80°C to form an unstable temperature boundary layer. Velocity, temperature and kinematic heat flux on the wind tunnel floor were measured using LDV, resistance thermometer and thin-film-type heat flow meters. The measured turbulent intensity showed good agreement with those obtained from field experiments and a water tank experiment when normalized by the convective velocity. The universal functions for velocity and temperature profiles were applied and empirical constants were optimized. The length scales of turbulent motion were estimated by means of the universal functions.