Reducing Nox Emissions in Supersonic Aircraft

1993 ◽  
Vol 65 (8) ◽  
pp. 9-9
Keyword(s):  
Nox Emissions ◽  
Supersonic Aircraft

Potential Ozone Column Increase Resulting from Subsonic and Supersonic Aircraft NOX Emissions

AIAA Journal ◽  
1977 ◽  
Vol 15 (9) ◽  
pp. 1322-1330 ◽  
Author(s):  
George F. Widhopf ◽  
Leslie Glatt ◽  
Raymond F. Kramer
Keyword(s):  
Nox Emissions ◽  
Supersonic Aircraft ◽  
Ozone Column

Aircraft Gas Turbine Emissions Challenge

1994 ◽  
Vol 116 (3) ◽  
pp. 474-477 ◽  
Author(s):  
B. L. Koff
Keyword(s):  
Fuel Efficiency ◽  
Harmful Effect ◽  
Pollutant Emissions ◽  
Nox Emissions ◽  
Oxides Of Nitrogen ◽  
Supersonic Aircraft ◽  
Significant Challenge ◽  
Unburned Hydrocarbon ◽  
Hc Emissions ◽  
New Generation

The new generation of jet powered aircraft faces a significant challenge to reduce pollutant emissions while increasing fuel efficiency. Carbon monoxide (CO) and unburned hydrocarbon (HC) emissions are already very low and continued control of these pollutants is expected as engine temperatures and pressure ratios are increased. In contrast, significant system design improvements are needed to reduce oxides of nitrogen (NOx) emissions because of their harmful effect on the earth’s ozone layer. This paper discusses the prospects and technical approaches for significant NOx reductions in current and future subsonic and supersonic aircraft.

scholarly journals Aircraft Gas Turbine Emissions Challenge

1993 ◽  
Author(s):  
B. L. Koff
Keyword(s):  
Fuel Efficiency ◽  
Harmful Effect ◽  
Pollutant Emissions ◽  
Nox Emissions ◽  
Oxides Of Nitrogen ◽  
Supersonic Aircraft ◽  
Significant Challenge ◽  
Unburned Hydrocarbon ◽  
Hc Emissions ◽  
New Generation

The new generation of jet powered aircraft faces a significant challenge to reduce pollutant emissions while increasing fuel efficiency. Carbon monoxide (CO) and unburned hydrocarbon (HC) emissions are already very low and continued control of these pollutants is expected as engine temperatures and pressure ratios are increased. In contrast, significant system design improvements are needed to reduce oxides of nitrogen (NOx) emissions because of their harmful effect on the earth’s ozone layer. This paper discusses the prospects and technical approaches for significant NOx reductions in current and future subsonic and supersonic aircraft.

Aircraft Cruise Nitrogen Oxides (NOx) Emissions Prediction and Environmental Pollution Factor

2007 ◽  
Vol 18 (5) ◽  
pp. 565-575 ◽  
Author(s):  
Louis Tsague ◽  
Thomas Tamo Tatietsé
Keyword(s):  
Nitrogen Oxides ◽  
Data Bank ◽  
Health Concern ◽  
Nox Emissions ◽  
Commercial Aircraft ◽  
Supersonic Aircraft ◽  
Limit Value ◽  
Pollution Factor ◽  
Predictive Correlation ◽  
Set Up

Nitrogen oxides (NOx) emitted at low altitude increase ozone formation, thus potentially affecting local air quality. On the other hand supersonic aircraft NOx emitted in the lower stratosphere deplete the ozone layer, which represents a serious health concern according to Richard Miake Lyea and Ulrich Schumannb). The necessity to evaluate aircraft NOx production at cruise is urgent, since ICAO standard on NOx limitations has not yet taken into account cruise NOx emissions. The purpose of this work is to solve the problem of aircraft cruise NOx emissions regulation. The evaluation of nitrogen oxides production according to operational time in mode is realized with the ICAO data bank from different types of aircraft engines. Cruise NOx production is compared to LTO NOx production. A predictive correlation linking cruise NOx production to flight distance is developed and evaluated with good accuracy. Although cruise NOx production prediction is very important, alone it may not be enough to settle a limitation regulation on cruise NOx emissions, then the maximum flight range and the maximum take off weight, as those important factors influencing the NOx emissions are taken into account to develop a specific NOx production parameter which can enable the commercial aircraft classification according to their pollution factor, by so doing, ICAO NOx emissions regulation can be completed using the approach we propose to set up a limit value on aircraft cruise NOx emissions.

scholarly journals Aircraft Turbine Engine NOx Emission Limits: Status and Trends

1992 ◽  
Author(s):  
D. W. Bahr
Keyword(s):  
Nox Emission ◽  
Future Generations ◽  
Nox Emissions ◽  
Aircraft Engines ◽  
Turbine Engine ◽  
Supersonic Aircraft ◽  
Status And Trends ◽  
Civil Aircraft ◽  
Percent Increase ◽  
Emission Limits

Within recent years, the NOx emissions of aircraft engines have received increased attention. More stringent limits on the NOx emissions of future subsonic civil aircraft engines are being considered. A 20 percent increase in the stringency of the existing ICAO standard has been proposed and, for the longer-term, the possibility of further increased stringency is being studied. For future supersonic civil aircraft engines, very stringent goals have been established. To meet these goals, combustor designs with ultralow NOx levels are required. Extensive efforts are, therefore, underway to develop low NOx combustors for use in future generations of both subsonic and supersonic aircraft engines.

The impact of design space constraints on the noise and emissions from derivative engines for civil supersonic aircraft

2021 ◽  
Author(s):  
Laurens Voet ◽  
Prakash Prashanth ◽  
Raymond Speth ◽  
Jayant Sabnis ◽  
Choon Tan ◽  
...  
Keyword(s):  
Design Space ◽  
Supersonic Aircraft ◽  
The Impact

ACTIVE CONTROL OF PERFORMANCE AND NOx EMISSIONS OF STAGED GASEOUS FUEL BURNER

1999 ◽  
Vol 8 (ASAT CONFERENCE) ◽  
pp. 1-11
Author(s):  
H. Mahmoud ◽  
Sh. Hammed ◽  
M. Nosier ◽  
A. Wandan ◽  
S. Abd EI-Ghany
Keyword(s):  
Active Control ◽  
Gaseous Fuel ◽  
Nox Emissions ◽  
Fuel Burner

Introduction

2018 ◽  
Author(s):  
Marcel Escudier
Keyword(s):  
Fluid Flow ◽  
Engineering Design ◽  
Ocean Waves ◽  
Basic Design ◽  
Natural Phenomena ◽  
Turbofan Engine ◽  
Expansion Waves ◽  
Supersonic Aircraft ◽  
Bodily Fluids ◽  
Design Calculations

In this chapter the wide array of engineering devices, from the kitchen tap (a valve) to supersonic aircraft, the basic design of which depends upon considerations of the flow of gases and liquids, is shown. Much the same is true of most natural phenomena from the atmosphere and our weather to ocean waves, and the movement of sperm and other bodily fluids. In this textbook a number of the concepts, principles, and procedures which underlie the analysis of any problem involving fluid flow or a fluid at rest are introduced. In this Introduction, examples have been selected for which, by the end of the book, the student should be in a position to make practically useful engineering-design calculations. These include a dam, a rocket motor, a supersonic aerofoil with shock and expansion waves, a turbojet engine, a turbofan engine, and the blading of a gas turbine.

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