空气阻力系数测试仪

摘要

In order to research quantitatively the relationship between force and shape and relative velocity of an object in airflow ,a tester of air resistance coefficient was made .A small wind tunnel was designed which could adjust wind velocity .Based on Bernoulli equation ,we used orifice to meas‐ure the wind velocity quantitatively ,and force sensor to measure the resistance of objects with differ‐ent shapes in the airflow ,then calculated the resistance coefficient .%为了定量研究固态物体与空气做相对运动时，物体的受力情况与形状和相对速度的关系研制了空气阻力系数测试仪。该仪器构建了一个小型的风洞，可以随意调节风洞风速的大小，并根据流体力学中的伯努利方程采用孔板法来定量测定风速，再设计了多种不同形状的物体效应物，用力传感器来测出它们在气流中所受的阻力，由此求得不同形状物体的相对阻力系数。