Compressors, Gas Turbines and Jet Engines
Producer gas is produced by

Partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast
Passing air and a large amount of steam over waste coal at about 65°C
Carbonisation of coal
Passing steam over incandescent coke

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Compressors, Gas Turbines and Jet Engines
In the axial flow gas turbine, the work ratio is the ratio of

Compressor work and turbine work
Actual compressor work and theoretical compressor work
Actual total head temperature drop to the isentropic total head drop from total head inlet to static head outlet
Output and input

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