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Saturday, May 2, 2020 | History

2 edition of Engine gaseous, aerosol precursor and particulate at simulated flight altitude conditions found in the catalog.

Engine gaseous, aerosol precursor and particulate at simulated flight altitude conditions

Engine gaseous, aerosol precursor and particulate at simulated flight altitude conditions

  • 222 Want to read
  • 40 Currently reading

Published by National Aeronautics and Space Administration, Lewis Research Center, National Technical Information Service, distributor in [Cleveland, Ohio], [Springfield, Va .
Written in English

    Subjects:
  • Exhaust gases.,
  • Exhaust emission.,
  • Particulates.,
  • Aerosols.,
  • Fuel tests.,
  • Engine tests.,
  • Air sampling.

  • Edition Notes

    StatementC.C. Wey ... [et al.].
    SeriesNASA/TM -- 1998-208509., NASA technical memorandum -- 208509.
    ContributionsWey, C. C., Lewis Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15546585M

    from this pattern was the a flight for a power plant plume study northeast of the Houston area (Springston et al., ). The altitude was maintained between to m except during spirals to determine the boundary layer height. 3. RESULTS AND DISCUSSION The PILS-IC system measured the inorganic aerosol ionic components, namely, Na+, NH 4. The oxygen level at high altitude is the same as at sea level, namely %. What is lower is the oxygen pressure. To avoid flameout, pilots must avoid to throttle the engine down too much, so a minimum pressure in the combustors can be maintained. Designers can increase the altitude performance by building longer combustors. Aerosol time-of-flight mass spectrometry (ATOFMS) as a real time monitor of individual aerosol particles in field studies. Particulate and gaseous receptor modeling for the Southern California Air Quality Study. Watson, John G. reaction mechanisms and reaction products leading to extreme acid rain and acid aerosol conditions in.


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Engine gaseous, aerosol precursor and particulate at simulated flight altitude conditions Download PDF EPUB FB2

Engine test, as well as a parallel flight measurement, attempts to address both issues by expanding measurements of aerosols and aerosol precursors with fuels containing different levels of fuel sulfur content. Aviation fuels with a range of fuel sulfur were procured for both sampling venues.

Get this from a library. Engine gaseous, aerosol precursor and particulate at simulated flight altitude conditions. [C C Wey; Lewis Research Center.;]. The specific objective of this engine test is to obtain a database of gaseous and particulate emissions as a function of fuel sulfur and engine operating conditions.

The database of the particulate emission properties is to be used as a comparative baseline with subsequent flight measurement. The engine used in this test was a Pratt & Whitney FE turbofan engine. Aviation fuel (Jet A) with a range of fuel sulfur Cited by: The overall objective of the NASA Atmospheric Effects of Aviation Project (AEAP) is to develop scientific bases for assessing atmospheric impacts of the.

The specific objective of this engine test is to obtain a database of gaseous and particulate emissions as a function of fuel sulfur and engine operating conditions. This paper addresses engine design and operational impacts on aerosol precursor emissions of S O x and N O y species.

Volatile PM formed from these species in the environment surrounding an aircraft is dependent on intraengine oxidation processes occurring both within and downstream of the by: The atmosphere of the Earth is a colloidal system that contains liquid and solid aerosol particles beside gas-phase components.

Aerosol particles are ubiquitous and play an important role in the physics and chemistry of the atmosphere, especially in the lower 10–km layer, the troposphere.

An aerosol is a suspension of small particles in air or another gas. From the point of view ofair pollution engineering, aerosols are important because unwanted particles are produced in combustion and other industrial Size: 2MB.

Several AMS instruments have been developed and generally involve a common series of steps. 25,26 First, the aerosol sample is evaporated, either by impaction on a heating block or using a laser. Electron impact or photoionization is used to ionize the sample prior to its introduction into a time-of-flight tube.

A turbojet aircraft is flying with a velocity of m/s at an altitude of m, where the ambient conditions are 32 kPa and –32°C.

The pressure ratio across the compressor is 12, and the temperature at the turbine inlet is K. Air enters the compressor at a rate of 50 kg/s, and the jet fuel has a heating value of 42, kJ/kg%(39). The aviation is the source of gaseous and particulate emissions into the atmosphere.

The number of. species emitted by jet engine is much enough and depends on a kind of a fuel and on an engine design. The emission from aviation engines is significantly smaller (in a factor of ) than that from surface. sources. Aircraft Particulate Matter Emission Estimation through all Phases of Flight Alexander Kugele 5.

3 Aircraft engine emissions. Aircraft emit gases and particles directly into the upper layers of the troposphere and the lower layers of the stratosphere, where they affect the.

The efficiency of the smoke meter at characterizing engine emissions [microform] / Jonathan D. Paladino; Engine gaseous, aerosol precursor and particulate at simulated flight altitude conditions [microform] / Scheduled civil aircraft emission inventories for [microform]:.

The analysis suggests that high fuel-air ratio designs may have to consider changes to cooling strategies to accommodate secondary combustion. A characteristic time methodology is developed to evaluate the chemical and fluid mechanical conditions that lead to combustion within the by: Particulate sizing and emission indices for a jet engine exhaust sampled at cruisePhysical Characterization or Aerosol Emissions from a Commercial Gas Turbine Engine, Journal of Propulsion and Power, 23, 5 Sulfuric acid measurements in the exhaust plume of a jet aircraft in flight: Implications for the sulfuric acid.

The general consensus of the workshop concurred that better characterization of SO_ and particulate emissions for a wider variety of engines are needed. The major points of agreement with regard to NRC recommendations were: • Consign a higher priority to particulate and aerosol research (designated as SO 2, SO 3, OH).

Boulon et al.: Charged aerosol measurements at Jungfraujoch the highest uncertainty in understanding and modeling the climatic system and its future evolution (IPCC, ).

One of the actual challenges in aerosol science is to describe ac-curately how new particles are formed from gaseous Cited by: Approximately 60% of the PM mass is lost in the standardized sampling system at engine idle and around 27% at high thrust using the size-resolved effective density.

The unit density led to estimates that were within 20% and 5% at idle and high thrust, by: CHAPTER 4: CALCULATION OF GASEOUS AND PARTICULATE EMISSIONS 1 Calculation: The Final reported test results of the gaseous emissions are derived through the following steps The exhaust gas mass flow rate GEXH or V' and V"EXH shall determined (see paragraph of.

A number of recent studies have shown that a large fraction, possibly the largest, of vehicular PM is secondary organic aerosol (SOA) produced via atmospheric oxidation of precursor gases Cited by: Engine Gaseous Aerosol Precursor and Particulate at Simulated Flight Altitude Conditions, NASA/TM Wofsy, S.C., R.C.

Cohen, and A.L. Schmeltekopf. Overview: The Stratospheric Photochemistry Aerosols and Dynamics Expedition (SPADE) and Airborne Arctic Stratospheric Expedition II (AASE-II). Evaluating the simulated radiative forcings, aerosol properties and stratospheric warmings from the Agung, El Chichón and Mt Pinatubo volcanic aerosol clouds Sandip S.

Dhomse, Graham W. Mann, Juan Carlos Antuña Marrero, Sarah E. Shallcross, Martyn P. Chipperfield, Ken S. Carslaw, Lauren Marshall, Nathan Luke Abraham, and Colin. The simulated flight Mach number was at sea level and for all other altitude conditions.

Aviation fuels that met or exceeded standard specification were used throughout the test. We note that because of the augmentor section, the exhaust remains in the casing longer than it would for a commercial airliner by: 8.

In the ’s when it became apparent that aviation activities had the potential of impacting both climate and air quality, NASA Aeronautics Mission Directorate (ARMD) collaborated with Science Mission Directorate (SMD) to conduct studies to improve understanding of aircraft emissions and to quantify the atmospheric effects of aviation.

[1] The series of SULFUR experiments was performed to determine the aerosol particle and contrail formation properties of aircraft exhaust plumes for different fuel sulfur contents (FSC, from 2 to μg/g), flight conditions, and aircraft (ATTAS, A, A, B, B, B, DC8, DC10).

This paper describes the experiments and summarizes the results obtained, including new results from Cited by: Aerosol and Gas–Aerosol Processes [10] The model treated one aerosol size distribution, – μm diameter, with 17 moving center [Jacobson, a] size bins in each grid number concentration of total particles and the mole concentrations of H 2 O(aq), H +, NH 4 +, Na +, H 2 SO 4 (aq), HSO 4 −, SO 4 2−, NO 3 −, Cl −, BC, organic matter [OM = organic carbon (OC.

TRB’s Airport Cooperative Research Program (ACRP) Report 9: Summarizing and Interpreting Aircraft Gaseous and Particulate Emissions Data explores a series of government-sponsored aircraft emissions tests that were undertaken to gain a better understanding of gaseous and particulate.

This work is focused on the numerical analysis of pollutant formation in an aviation gas turbine engine at different values of power setting. The analysis is conducted on the basis of a comprehensive approach treating the reactor net model for description of nonequilibrium chemical processes inside the combustor and the quasi-one-dimensional model to compute the evolution of species Cited by: Against the Emission of Gaseous and Particulate Pollutants from Internal Combustion Engines to be Installed in Non-Road Mobile Machinery Regulations, (2) These regulations implement the following requirements: (a) Directive 97/68/EC of the European Parliament and of the Council of 16 December on the approximation of.

Aircraft emissions impact human health though degradation of air quality. The majority of previous analyses of air quality impacts from aviation have considered only landing and takeoff emissions. We show that aircraft cruise emissions impact human health over a hemispheric scale and provide the first estimate of premature mortalities attributable to aircraft emissions by: Chemical composition of aircraft exhaust aerosols investigated by Universitaet Mainz Ready for the next flight: NASA's flying laboratory, the DC 8 is fitted with 14 measuring instruments.

We present ground-based, advected aircraft engine emissions from flights taking off at Los Angeles International Airport. discrete engine Cited by: 4. The specific objective of this engine test is to obtain a database of gaseous and particulate emissions as a function of fuel sulfur and engine operating conditions.

The database of the particulate more» emission properties is to be used as a comparative baseline with subsequent flight measurement. Aero-thermodynamic and chemical process interactions in an axial high-pressure turbine of aircraft engines Engine design and operational impacts on particulate matter precursor emissions.

Experimental characterization of gas turbine emissions at simulated flight altitude conditions Cited by: 1. Precise investigation of aero-thermodynamic and chemical processes relating to environmental precursor pollutants in an aircraft turbine is Huegel, M, Garnier, F.

Numerical prediction of gaseous aerosol precursors and particles Experimental characterization of gas turbine emissions at simulated flight altitude conditions (DTIC Cited by: 1.

A jet engine is a type of reaction engine discharging a fast-moving jet that generates thrust by jet broad definition includes airbreathing jet engines (turbojets, turbofans, ramjets, and pulse jets).

[clarification needed] In general, jet engines are combustion term "jet engine" is commonly used only for airbreathing jet engines. They are suspended in the atmosphere as atmospheric aerosol, a term which refers to the particulate/air mixture, as opposed to the particulate matter alone. However, it is common to use the term aerosol to refer to the particulate component alone.[4] Sources of particulate matter can be manmade or natural.

July 1 Flight (minimal particulate air pollution) July 22nd Flight (heavy particulate air pollution) In the HSRL data readouts, high levels of aerosols are shown in red and yellow, while lower levels of particles are shown in blue. On the first day of science flights – July 1st – temperatures were moderate and aerosol levels were low.

Altitude has a significant effect on combustion of heavy-duty diesel engines, especially during cold start. An experimental study on a heavy-duty diesel engine operating at different altitudes was conducted. Tests were based on a direct injection (DI) turbocharged diesel engine with intake and exhaust pressure controlled by the plateau simulation test system to stimulate altitude conditions Cited by: 5.

18 km – cruising altitude of Concorde; 27 km – circumference of the Large Hadron Collider, as of May the largest and highest energy particle accelerator; km – highest manned balloon flight (Malcolm D.

Ross and Victor E. Prather on 4 May ) km – length of the Second Lake Pontchartrain Causeway in Louisiana, US. 94 of SF6 make it ideal as a tracer gas to simulate gas contaminant (Zhang et al. ) and often used to 95 measure ventilation rate (Cheong, ). In addition, the density of the 1% SF6-N2 mixed gas 96 (kg/m3) is similar to that of air (kg/m3), so the buoyancy effect of the mixed gas .Using well-characterized gas and aerosol probes and measurement systems, the participants collected data behind both the Langley TA (JGE engine) and B (RB) aircraft at sampling distances ranging from 1 to 35 m.Evaluation of alternative in-flight fire suppressants for full- scale testing in simulated aircraft engine nacelles and dry bays (SuDoc C ) [U.S.

National Archives and Records Administration] on *FREE* shipping on qualifying offers. Evaluation of alternative in-flight fire suppressants for full- scale testing in simulated aircraft engine nacelles and dry bays (SuDoc C 13 Author: U.S.

National Archives and Records Administration.