Gas fuel injector for wide range of calorific values

Details Gas fuel injector for wide range of calorific values Gas fuel injector for wide range of calorific values

1982-10-05

1984-11-20

Croyle, Carlton R.

Power plants

Combustion products used as motive fluid

Using special fuel or oxidizer

60737, 60748, 239403, F02C 322, F23R 314

Patent

active

044831382

ABSTRACT:
A gas fuel injector for a gas turbine engine power plant is arranged to reduce the sensitivity of combustion efficiency to variations in gas fuel velocity injector exit at engine idle. The injector comprises a gas fuel duct which discharges gas fuel into a swirler assembly having passages of decreasing cross-sectional area, the passages also receiving a flow of compressor delivery air from the compressor of the power plant. There is an energy interchange between the gas fuel which may have a velocity of between 80 fps to 1000 fps depending on type of fuel, and the air such that the gas and air leave the injector at similar velocities. It has been found that if these velocities are matched, the combustion efficiency is less sensitive to gas velocity and produces higher combustion efficiencies than an arrangement whereby the velocity of the gas entering the system is dictated by the heat input requirements.

REFERENCES:
patent: 2920449 (1960-01-01), Johnson et al.
patent: 3736746 (1973-06-01), Dubell et al.
patent: 3851466 (1974-12-01), Verdouw
patent: 3905192 (1975-09-01), Pierce et al.
patent: 3961475 (1976-06-01), Wood
patent: 4189913 (1980-02-01), Carlisle
patent: 4199934 (1980-04-01), Meyer
patent: 4362021 (1982-12-01), Willis
patent: 4373342 (1983-02-01), Willis et al.

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