Turbine Stage Write down the Euler work equation for an axia

Turbine Stage

Write down the Euler work equation for an axial turbomachinery stage with repeating stage conditions and constant annulus size in terms of the blade loading coefficient and the flow coefficient. If the above turbine has a 50% reaction stage, a stage loading coefficient of 1.0 and if the relative inlet angle at the rotor is zero, then draw a possible shape of the velocity triangle that satisfies the above conditions. c. Explain in fewer than five sentences, what is meant by \'specific speed\' of a turbomachine? The specific speed (N_s) of a low speed turbomachine is given by the expression: N_s = Q^1/2/(Delta P_0/rho)^3/4 Ohm Where, Q is the volume flow rate, P_0 is the total pressure and rho is the density of the working fluid, and Ohm is the angular velocity of the machine. The figure below (Figure 1) shows three different machines (Machine 1, Machine 2 and Machine 3) and their relative sizes. Order them from the lowest to the highest values of specific speed. Describe the rationale behind your ordering based on the definition of specific speed.

Solution

2. specific speed is the speed of a turbine which would deliver unit discharge per unit head.