The Steam Injector
A theoretical and practical treatise on the design and operation of injectors and on the flow of fluids through and the design of nozzles.
Forfatter: V. A. B. Hughes
År: 1912
Forlag: The Technical Publishing Company Limited
Sted: London
Sider: 145
UDK: 621.176
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THE STEAM NOZZLE.
19
piessure P2 and of volume V2) after discharge is completed,
and AB is the expansion curve, then the valne of U in
the equation III. is given by the ishaded area of the figure.
The adiabatic expansion curve for steani is a particular
case of the general formuk P1 Vf = constant (where P
denotes pressure in pounds per square foot, V volume in
pounds per cubic foot of fluid at pressure and n the
coefficient of expansion).* The area bounded by the expan-
sion curve is obtained thus: —
/v.,
P d V;
v,
but P V“ = P, V ”;
P = Pi V “
yn ’
area
v., p vn
P1V1 - P3Vo
n — 1
Snecific heat at constant pressure
Specific heaj at constant volume’