﻿ 渣浆泵水力学与流体力学基础_公司新闻_河北沐阳泵业安徽快3开奖结果

# 安徽快3开奖结果

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ρ=M/V

ρ----流体的密度， kg/m3;
M----流体的质量kg;

V-----流体的体积，m3

y----流体的重度,N/m3; (工程制kgf/m3 );
G----流体的重量，N (工程制 kgf);

V----流体的体积, m3;

G=Mg

(1-2):               γ=Mg/V=pg

1. 流体的压缩性

2.流体的热胀性

Basic knowledge of hydrodynamics and hydrodynamics of slurry pump

Section I main mechanical properties of fluid

I. density ρ

The mass per unit volume is the density of the fluid, expressed as ρ。 See Table 1-1 and table 1-2 for the density of water。

For homogeneous fluid: ρ = m / V

Where ρ - density of fluid, kg / m3;

M - mass of fluid, kg;

V -- volume of fluid, m3.

II. Severe γ

For homogeneous fluid: γ = g / V

Where y is the density of fluid, N / m3; (Engineering kgf / m3);

G - weight of fluid, n (Engineering KGF);

V - volume of fluid, m3;

Density and gravity: because weight is the product of mass and acceleration of gravity, that is:

G=Mg

Substituting formula (1-2): γ = mg / v = PG

Where, G ---- acceleration of gravity, M / S2, g = 9.807m/s2.

III。 compressibility and thermal expansion of fluid

1. Compressibility of fluid

The compressibility of a fluid is the property that the fluid is compressed, the volume is reduced, and the density is increased。 The change of fluid with the increase or decrease of pressure is very small, which can be regarded as constant。 It is called incompressible fluid, for example, liquid is incompressible fluid。 However, the volume and density of gas change significantly with the increase or decrease of pressure, which is called compressible fluid。

2。 Thermal expansion of fluid

After the fluid is heated, its volume expands and its density decreases, which is called the thermal expansion of the fluid.