摘要
本文运用流体力学原理解释了液态金属流经直浇道时的吸气及液流脱离型壁的原因,并揭示出伯努力方程中断面上的压力是流体相对静止管壁运动计算和测量的产物。一旦测量的参照物选在运动的流体上时,在没有相对运动的流体内部因运动而产生的压力也立即消失,取而代之的是原来流体的静压力,恰恰是这一压力梯度把液态金属的夹杂物推向管壁进而除去。
The interpretes the reason why fluidity metal through sprue can inspire gas and breakaway mould wall applying theory of fluidity mechanics,and reveals that the section pressure in the Bernoulli equation is the progeny which is arrived after figuring and measuring when liquid moves on the static wall.When the moving fluidity was chosen as referent,the pressure caused by moving would disappear in the fluidity without relative moving.And the whilst pressure would arise.The pressure slope could push the impurity in the fluidity to the surface of pipeline and get rid of it.
出处
《铸造》
CAS
CSCD
北大核心
2004年第11期901-904,共4页
Foundry
关键词
液态金属
直浇道
伯努力方程
负压
fluidity metal
sprue
Bernoulli equation
negative pressure
