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Design and Simulation of Two Stroke Engines

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Nomenclature<br />

NAME SYMBOL UNIT (SI)<br />

Coefficients<br />

Coefficient <strong>of</strong> heat transfer, conduction<br />

Coefficient <strong>of</strong> heat transfer, convection<br />

Coefficient <strong>of</strong> heat transfer, radiation<br />

Coefficient <strong>of</strong> friction<br />

Coefficient <strong>of</strong> discharge<br />

Coefficient <strong>of</strong> contraction<br />

Coefficient <strong>of</strong> velocity<br />

Coefficient <strong>of</strong> loss <strong>of</strong> pressure, etc.<br />

Squish area ratio<br />

Coefficient <strong>of</strong> combustion equilibrium<br />

Area ratio <strong>of</strong> engine port to engine duct<br />

Dimensions <strong>and</strong> phvsical quantities<br />

area<br />

diameter<br />

length<br />

length <strong>of</strong> computation mesh<br />

mass<br />

molecular weight<br />

radius<br />

time<br />

volume<br />

force<br />

pressure<br />

pressure ratio<br />

pressure amplitude ratio<br />

mass flow rate<br />

volume flow rate<br />

velocity <strong>of</strong> gas particle<br />

velocity <strong>of</strong> pressure wave propagation<br />

velocity <strong>of</strong> acoustic wave (sound)<br />

Young's modulus<br />

wall shear stress<br />

gravitational acceleration<br />

XIX<br />

Ck<br />

ch<br />

cr<br />

Cf<br />

cd<br />

Cc<br />

cs<br />

CL<br />

c<br />

Kr<br />

A<br />

d<br />

X<br />

L<br />

m<br />

M<br />

r<br />

t<br />

V<br />

F<br />

P<br />

P<br />

X<br />

m<br />

V<br />

c<br />

a<br />

a<br />

Y<br />

X<br />

g<br />

sq<br />

W/mK<br />

W/m 2 K<br />

W/m 2 K 4<br />

m 2<br />

m<br />

m<br />

m<br />

kg<br />

kg/kgmol<br />

m<br />

s<br />

m 3<br />

N<br />

Pa<br />

kg/s<br />

m 3 /s<br />

m/s<br />

m/s<br />

m/s<br />

N/m 2<br />

N/m 2<br />

m/s 2

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