Aero-acoustic wind tunnel has sound-damping structure comprising blade profiles with soft profile surfaces, such that cross-sectional areas of blade profiles in flow direction are set more than that of areas before bisection

摘要

The wind tunnel has measuring section with closed deflection corners (6) and blower having current feedback tube (2). A sound-damping structure (14) arranged in deflection corner, has blade profiles (18) with soft profile surfaces (30), such that cross-sectional areas of blade profiles in flow direction (21) are set to 50% more than that of areas before bisection.