摘要
对水流冲不走乒乓球现象中水流流量、漏斗开口角度、乒乓球质量对实验成功率的影响进行理论和实验研究.利用伯努利方程建模分析表明:乒乓球上下表面水流速度差引起压力差是产生此现象的主要因素.理论分析和实验测量均表明:水流量越大、漏斗的开口角度越小水流托起的乒乓球质量越大,实验成功率越高.保证实验成功率的实验最佳条件为:水流量大于40L/h,漏斗的开口角度在30°~45°,采用正常轻质的乒乓球.
Based on Bernoulli principle, this paper studied quantitatively the phenomenon that a ping-pong ball in an inverted funnel would remain attached to the funnel when water flowed through the neck. The experimental results showed that when keeping the flux rate of the water constant, the ping-pong ball could stay in the funnel when the opening angle of the funnel was between 30°-45°. When keeping the funnel angle constant, the maximum mass of the ball before falling increased with the flux rate of the water. And the probability of keeping the ping-pong ball stay in the funnel increased with the flux rate of the water. The simulation results agreed with that of the experiments.
出处
《物理实验》
2017年第6期14-18,共5页
Physics Experimentation
基金
"东师教学学术研究支持计划"教师教学发展基金项目(No.15B2XZJ001
No.15B1XZJ015)
高等学校物理实验课程教学研究项目(No.01-201601-46)
关键词
伯努利原理
流体力学
压力差
Bernoulli principle
fluid mechanics
pressure difference
