物理学上把不可压缩和粘滞性可忽略的流体称作理想流体。研究流体运动常用的有流场、流线、流管、流量等概念。pυΔs=恒量叫做稳定流动的连续性方程。伯努利方程表达式为P1v12gh1P2v22gh2,伯努利方程表明在同一流管的不同截面处,单位体积流体的动能v2,单位体积流体的势能gh,单位体积流体的压强能P三项之和为一恒量。这表明理想流体做稳定流动时能量守恒。 Physically, fluids that are incompressible and have negligible viscosity are called ideal fluids. Research fluid flow commonly used in the flow field, flow lines, flow pipe, flow and other concepts. pυΔs = constant is called the continuity equation of steady flow. The Bernoulli equation is P1v12gh1P2v22gh2. The Bernoulli equation shows that the kinetic energy v2 of a unit volume of fluid, the potential energy gh of a unit volume of fluid, and the pressure energy P of a unit volume of fluid at different sections of the same flow tube are one constant. This shows that the ideal fluid to do steady flow of energy conservation.