Investigation of low NOx staged combustor concept in high-speed civil transport engines

Nguyen, H. L.; Bittker, D. A.; Niedzwiecki, R. W.

doi:10.2514/6.1989-2942

Cited by 11 publications

(2 citation statements)

References 8 publications

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“…4. The predictions are based on the Cl-C2 mechanism used for methane and ethylene with three reactions added for the conversion of the propane to ethane (Nguyen et al, 1989). The data show close agreement with the chemical reactor model.…”

Section: Ethylene and Propanementioning

confidence: 69%

Variables Affecting NOx Formation in Lean-Premixed Combustion

Steele

Jarret

Malte

et al. 1997

Journal of Engineering for Gas Turbines and Power

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The formation of NOx in lean-premixed, high-intensity combustion is examined as a function of several of the relevant variables. The variables are the combustion temperature and pressure, fuel type, combustion zone residence time, mixture inlet temperature, reactor surface-to-volume ratio, and inlet jet size. The effects of these variables are examined by using jet-stirred reactors and chemical reactor modeling. The atmospheric pressure experiments have been completed and are fully reported. The results cover the combustion temperature range (measured) of 1500 to 1850 K, and include the following four fuels: methane, ethylene, propane, and carbon monoxide/hydrogen mixtures. The reactor residence time is varied from 1.7 to 7.4 ms, with most of the work done at 3.5 ms. The mixture inlet temperature is taken as 300 and 600 K, and two inlet jet sizes are used. Elevated pressure experiments are reported for pressures up to 7.1 atm for methane combustion at 4.0 ms with a mixture inlet temperature of 300 K. Experimental results are compared to chemical reactor modeling. This is accomplished by using a detailed chemical kinetic mechanism in a chemical reactor model, consisting of a perfectly stirred reactor (PSR) followed by a plug flow reactor (PFR). The methane results are also compared to several laboratory-scale and industrial-scale burners operated at simulated gas turbine engine conditions.

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Section: Ethylene and Propanementioning

confidence: 69%

Variables Affecting NOx Formation in Lean-Premixed Combustion

Steele

Jarret

Malte

et al. 1997

Journal of Engineering for Gas Turbines and Power

View full text Add to dashboard Cite

show abstract

“…Typically, numerical prediction methods are used to complement experimental studies, both to understand the dynamics and to extend the experimental results to unmeasured or unmeasurable operating conditions. However, most numerical schemes currently used for prediction purposes are based on steady-state schemes (e.g., Correa, 1984;Correa and Shyy, 1987;Magnussen and Hjertager, 1977;Swithenbank et al, 1980;Nguyen and Bittker, 1989) and are unable to account for the highly unsteady phenomena occurring during rapid mixing. Some earlier attempts to include the effects of unsteady mixing (e.g., Pope and Correa, 1986;Pratt, 1980;Butler and Pratt, 1986;Chen and Dibble, 1990) have resulted in somewhat improved predictions.…”

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confidence: 99%