8/17/2019 Steam Turbine Costruction

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STEAM TURBINE CONSTRUCTION:

1. What do you understand bya. Nozzleb. Difuser

2. What is the velocity o sound in an ideal gas? Write down the expression .n

what actors velocity o sound depends?!. What is critical ratio or

a. "irb. Dry saturated stea#c. $uper saturated stea#

%. &ow does energy conversion occurs ina. i#pulse bladeb. 'eaction blade

(. What is the opti#u# velocity ratio f ora. )#pulse stageb. *wo rows +urtis stagec. (,- reaction stage

. &ow is degree o reaction is de/ned? What is a (,- reaction turbine ?0. Why is a two row +urtis stage #ost oten used as the /rst stage in large

stea# turbine?. What do you understand by partial ad#ission o steel ?. What do you understand by throttle governing and nozzle governing?1,.What is an e#ergency governor? When does it operate?11.Na#e so#e supervisory and control instru#ents used in stea# turbine ?12.Why the turbine blades are tapered towards the tips? 3xplain1!.&ow are the turbine rotor blades are astened to the disc 4 dru#41%.What is turning gear ? when it is put into service?1(.What is the diference between shrouds and lacing wires? Why they are used.

1.What is critical speed ? &ow it is observed?10.Why is hydrogen gas used or cooling o generator?1.What do you understand by hydrogen gas purity? What is the sae li#it o

hydrogen gas purity?1.What is Willia#s 5ine?3xplain.