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Procedure for the Calculation of Non-Volatile Particulate Matter Sampling and Measurement System Losses and System Loss Correction Factors

E-31P Particulate Matter Committee
  • Aerospace Standard
  • ARP6481
  • Current
Published 2019-02-25 by SAE International in United States
This SAE Aerospace Recommended Practice (ARP) details the recommended process for correcting measured non-volatile Particulate Matter (nvPM) mass and number data for particle losses in the sampling and measurement system specified in ARP6320. This technique is only recommended for conditions where both nvPM mass and number concentration measurements are in the valid measurement ranges of the instruments which are discussed in the tool limitations section. This ARP also supplies an Excel® software tool with documentation to automate the process. The body of the ARP details the recommended calculation method, uncertainties and limitations of the system loss correction factors. It explains, in detail, the required inputs and outputs from the supplied Excel® software tool (developed on Windows 7, Excel® 2016). Also included are: The Excel® correction tools (Attachments I and V). Installation instructions for a Windows based computer (Attachment II). A user technical manual (Attachment III) describing functions used within the tool and optional Excel® add-in (Attachment VI). Multiple Sample Test Cases (Attachment IV). The Excel® tools are intended to do the full calculation described in…
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Aircraft Exhaust Nonvolatile Particle Matter Measurement Method Development

E-31P Particulate Matter Committee
  • Aerospace Standard
  • AIR6037A
  • Current
Published 2018-11-20 by SAE International in United States
This report provides current practice measurement methods for quantifying nonvolatile particle matter at the exit plane of aircraft gas turbine engines. This document contains detailed information for many instruments and techniques, described in AIR5892A, that have been applied in aircraft engine field tests since AIR5892A was first issued in April 2003. There are four sections, identified as Technical Appendices (TA), presenting measurement techniques, sampling, and quantification of nonvolatile particles. The sections are written in the format of Aerospace Recommended Practice (ARP) documents and intended to progress to recommended practices upon overcoming existing technical challenges. Many important technical advances have been accomplished that comprise the Aircraft Engine Exhaust Nonvolatile Particle Matter Measurement Method Development techniques described in TA A: Particle Mass,TA B: particle Number and Size,TA C: Particle Sampling, and TA D: Calculation of Particle Number and particle Mass Emission Indices. Various measurement methodologies and operability and compatibility issues are described within the TAs. The TAs briefly discuss degrees of sensitivity, accuracy, repeatability, and test operations acceptability for each measurement discipline. They reflect that many important…
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Procedure for the Continuous Sampling and Measurement of Non-Volatile Particulate Matter Emissions from Aircraft Turbine Engines

E-31P Particulate Matter Committee
  • Aerospace Standard
  • ARP6320
  • Current
Published 2018-01-05 by SAE International in United States
This SAE Aerospace Recommended Practice (ARP) describes recommended sampling conditions, instrumentation, and procedures for the measurement of non-volatile particle number and mass concentrations from the exhaust of aircraft gas turbine engines. Procedures are included to estimate sampling system loss performance. This ARP is not intended for in-flight testing, nor does it apply to engines operating in the afterburning mode. This ARP is intended as a guide toward standard practice and is subject to change to keep pace with experience and technical advances.
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Procedure for the Calculation of non-volatile Particulate Matter Sampling and Measurement System Penetration Functions and System Loss Correction Factors

E-31P Particulate Matter Committee
  • Aerospace Standard
  • AIR6504
  • Current
Published 2017-10-10 by SAE International in United States
This SAE Aerospace Information Report (AIR) describes a method for assessing size dependent particle losses in a sampling and measurement system of specified geometry utilizing the non-volatile PM (nvPM) mass and number concentrations measured at the end of the sampling system.1 The penetration functions of the sampling and measurement system may be determined either by measurement or by analytic computational methods. Loss mechanisms including thermophoretic (which has a very weak size dependence) and size dependent losses are considered in this method2 along with the uncertainties due to both measurement error and the assumptions of the method. The results of this system loss assessment allow development of estimated correction factors for nvPM mass and number concentrations to account for the system losses facilitating estimation of the nvPM mass and number at the engine exhaust nozzle exit plane. As the particle losses are size dependent, the magnitude of correction factors can vary as a function of many factors including combustor technology and engine operating condition. Implementation of the nvPM sampling and measurement system for aircraft engine testing,…
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Procedure for the Continuous Sampling and Measurement of Non-Volatile Particle Emissions from Aircraft Turbine Engines

E-31P Particulate Matter Committee
  • Aerospace Standard
  • AIR6241
  • Current
Published 2013-11-18 by SAE International in United States
This SAE Aerospace Information Report (AIR) describes procedures, required continuous sampling conditions, and instrumentation for the measurement of non-volatile particle number and mass concentrations from the exhaust of aircraft gas turbine engines. Procedures are included to calculate sampling loss performance. This AIR is not intended for in-flight testing, nor does it apply to engine operating in the afterburning mode.
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Nonvolatile Exhaust Particle Measurement Techniques

E-31P Particulate Matter Committee
  • Aerospace Standard
  • AIR5892B
  • Current
Published 2012-03-07 by SAE International in United States
This SAE Aerospace Information Report (AIR) addresses procedures applicable to quantifying the emission of nonvolatile particulate matter at the exit plane of aircraft gas turbine engines. While both volatile and nonvolatile particulate matter (PM) are present in aircraft gas turbine exhaust, the methods used to measure nonvolatile particles are farther advanced and are addressed here. Existing PM measurement regulations employ the SAE Smoke Number measurement (Reference 2.1.1), a stained filter technique used in evaluating visible emissions. The environmental and human health issues associated with submicronic PM emissions require more detailed measurement of the mass, size, and quantity of these particle emissions. Responding to regulatory agency requests, this AIR describes measurement techniques that are well developed and could be applied to the measurement of aircraft engine particulate matter. The techniques discussed here are considered relevant for measuring particle parameters identified with environmental and health concerns. The discussion that follows is based on research made while developing measurement techniques and in scientific and engineering experiments regarding PM emissions. The techniques are not yet used in routine aircraft…
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Aircraft Exhaust Nonvolatile Particle Matter Measurement Method Development

E-31P Particulate Matter Committee
  • Aerospace Standard
  • AIR6037
  • Historical
Published 2010-03-02 by SAE International in United States
This report provides current practice measurement methods for quantifying nonvolatile particle matter at the exit plane of aircraft gas turbine engines. This document contains detailed information for many instruments and techniques, described in AIR5892A, that have been applied in aircraft engine field tests since AIR5892A was first issued in April 2003. There are four sections, identified as Technical Appendices (TA), presenting measurement techniques, sampling, and quantification of nonvolatile particles. The sections are written in the format of Aerospace Recommended Practice (ARP) documents and intended to progress to recommended practices upon overcoming existing technical challenges. Many important technical advances have been accomplished that comprise the Aircraft Engine Exhaust Nonvolatile Particle Matter Measurement Method Development techniques described in TA A: Particle Mass,TA B: particle Number and Size,TA C: Particle Sampling, and TA D: Calculation of Particle Number and particle Mass Emission Indices. Various measurement methodologies and operability and compatibility issues are described within the TAs. The TAs briefly discuss degrees of sensitivity, accuracy, repeatability, and test operations acceptability for each measurement discipline. They reflect that many important…
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