. The steam-engine and other heat-motors. Fig. 250a. blades is negligible, the total kinetic energy generated there isper pound of steam per second Vi229 A SUPERHEATED STEAM AND STEAM-TURBINES. 475 The reaction work due to the increase of relative velocityfrom V\ to i2 is „ 2 7, 2 I 2 — I 1 Km = 29 The kinetic energy due to the absolute velocity of the steam V22at exit from the first row of revolving blades is —. Hence ^9 TV 2g The net work done in the first stage is K=K8 +Km — The total work done in the moving blades is Kt=Ka+Km. The fraction called the degree of reaction isW^. In the second
. The steam-engine and other heat-motors. Fig. 250a. blades is negligible, the total kinetic energy generated there isper pound of steam per second Vi229 A SUPERHEATED STEAM AND STEAM-TURBINES. 475 The reaction work due to the increase of relative velocityfrom V\ to i2 is „ 2 7, 2 I 2 — I 1 Km = 29 The kinetic energy due to the absolute velocity of the steam V22at exit from the first row of revolving blades is —. Hence ^9 TV 2g The net work done in the first stage is K=K8 +Km — The total work done in the moving blades is Kt=Ka+Km. The fraction called the degree of reaction isW^. In the second stage, if V\ is the absolute velocity of entranceto the stationary row of blades and V2 the absolute velocity atexit from the revolving row, and if the relative velocity in the Stag? a < StageB Stage C < i. U = 250 Fig. 251. second row is increased from i^ to v2 as before, the net work be (Fig. 251) V12~V22 v£-vx* 29 2g 476 THE STEAM-ENGINE AND OTHER HEAT-MOTORS. Condenser or^Exnaast Pressure
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