Steam turbines; a practical and theoretical treatise for engineers and students, including a discussion of the gas turbine . Fig. 223. Arinengaud and Lemales Gas Turbine. wheel by a separate nozzle M. When the turbine is in operationthe lining becomes sufficiently hot to ignite the fuel as it isforced into the chamber. A gas turbine of this latter type designed by Arinengaud andLemale of Paris is illustrated in Fig. 223. It is a machinedeveloping 300 net horsepower at 4000 revolutions per minute. GAS TURBINES 439 A Rateau turbine-compressor shown direct connected to the gasturbine in Fig. 224
Steam turbines; a practical and theoretical treatise for engineers and students, including a discussion of the gas turbine . Fig. 223. Arinengaud and Lemales Gas Turbine. wheel by a separate nozzle M. When the turbine is in operationthe lining becomes sufficiently hot to ignite the fuel as it isforced into the chamber. A gas turbine of this latter type designed by Arinengaud andLemale of Paris is illustrated in Fig. 223. It is a machinedeveloping 300 net horsepower at 4000 revolutions per minute. GAS TURBINES 439 A Rateau turbine-compressor shown direct connected to the gasturbine in Fig. 224 has been specially designed and built byBrown, Boveri & Co. of Baden, Switzerland, for use with thisturbine. The compressor gives a mechanical efficiency as highas 65 to 70 per cent, and delivers 1 cubic foot of air per second. Fig. 224. Arinengaud and Lemales Gas Turbine Direct Connected to aRateau Turbine-Compressor. at a pressure of from 6 to 7 atmospheres. Compressed air isused for starting, and a simple ignition device is used for firingthe charge till the combustion chamber becomes sufficientlyheated. M. Barbezat, who has now charge of the developmentof this turbine, states that the total efficiency is not as high asthat of reciprocating gas engines; but no data are given. 440 THE STEAM TURBINE Gas turbines have been applied practically for the propulsionof submarine torpedoes. Formerly some types of torpedoesreceived their motive power from a rotary motor like a turbinewheel, driven by compressed air. Recently gas turbines havebeen installed with an obvious gain in power and saving in gas turbines develop 120 horsepower at 1000 revolutionsper minute. The expansion ratio of the nozzles is and theweight per horsepower, without the compressor, is pounds. It is obvious, then, that gre
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