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Tests show a 60% NOx reduction potential in a rectangular combustor sector, indicating effects of pressure and temperature.
The results of extended investigation of the “Rich Lean” combustion concept presented in this paper are based on MTU experience with a rich-lean burning tubular combustor /1/. The outcome of the tubular combustor research was used for the design of a rich-lean burning rectangular combustor sector, which was tested at three different entry temperatures and pressures up to 6 bar. The test results indicate that • the lowest NOx emission could be measured for a nozzle equivalence ratio of Φ = 2.1; • NOx emissions correlate with pressure according to NOx ∼ p0.4; • the dependence of NOx emissions on temperature expresses by NOx ∼ exp (T/250); • compared to current ICAO /2/ regulations the rich-lean burning combustor investigated offers a NOx reduction potential of 60 %.
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Zarzalis et al. (1995) studied this question.
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