Lean premix combustion system having reduced combustion pressure

Details Lean premix combustion system having reduced combustion pressure Lean premix combustion system having reduced combustion pressure

1992-11-10

1994-06-21

Bertsch, Richard A.

Power plants

Combustion products used as motive fluid

Combustion products generator

60748, F23R 332

Patent

active

053219473

ABSTRACT:
The lean premix combustion approach for NOx emissions control in gas turbine combustion systems has led to the problems of increased combustion pressure oscillation during engine operation and flame outs during rapid engine load reduction. Combustion pressure oscillation can reduce the durability of the engine and combustion system components to unacceptable levels. Flame outs can make the engine unacceptable from the operational viewpoint. The use of a control device allows the combustion pressure oscillation amplitude to be controlled to levels required for long durability of the combustion system components. It also allows an engine control system to operate the engine at part load condition and during rapid load reduction without flame out. When used at small levels, its effect on the engine NOx emissions is small. Higher levels may sometimes be needed to control the combustion pressure oscillation to acceptable levels. In such a situation, the penalty of increased NOx emissions has to be accepted in order to have an operationally acceptable engine.

REFERENCES:
patent: Re23149 (1949-09-01), Lubbock et al.
patent: 2826039 (1958-03-01), Ashwood
patent: 3713588 (1973-01-01), Sharpe
patent: 4702073 (1987-10-01), Melconian
patent: 4726192 (1988-02-01), Willis et al.
patent: 5069029 (1991-12-01), Kiroda et al.
patent: 5121608 (1992-06-01), Willis et al.
Article entitled "Ongoing Development of a Low Emission Industrial Gas Turbine Combustion Chamber" published in the Journal of Engineering for Power, Jul. 1980, vol. 102, pp. 549-554 by V. M. Sood and J. R. Shekleton.

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