Methodology to Improve AEDT Quantification of Aircraft Taxi/Idle Emissions (2016) / Chapter Skim
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B-1 Relevance of ACRP 02-45 Aircraft Engine Test Data to Aircraft Fleet/FFR/EIs in AEDT 1. Introduction For the purpose of the ACRP 02-45 project, there is a need to establish the relevance of the proprietary international aircraft engine performance data from the Test Data Engines listed below to the aircraft fleet operating in the United States (U.S.)
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B-2 Table B-1 U.S. Domestic Airline-Owned Aircraft with Test Data Engines (2014)
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B-3 ππ = 100 ΓmaxοΏ½ΞπΉπΉ ,ΞπππΆπΆπ₯π₯πΌπΌπΌπΌ ,ΞπππΆπΆπ₯π₯π΄π΄π΄π΄ , οΏ½ ΞπΉπΉ = οΏ½πΉπΉ β πΉπΉπ
π
πΉπΉπ
π
οΏ½ ΞπππΆπΆπ₯π₯πΌπΌπΌπΌ = οΏ½πΈπΈπΌπΌπππΆπΆπ₯π₯πΌπΌπΌπΌ β πΈπΈπΌπΌπππΆπΆπ₯π₯πΌπΌπΌπΌπ
π
πΈπΈπΌπΌπππΆπΆπ₯π₯πΌπΌπΌπΌπ
π
οΏ½ ΞπππΆπΆπ₯π₯π΄π΄π΄π΄ = οΏ½πΈπΈπΌπΌπππΆπΆπ₯π₯π΄π΄π΄π΄ β πΈπΈπΌπΌπππΆπΆπ₯π₯π΄π΄π΄π΄π
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πΈπΈπΌπΌπππΆπΆπ₯π₯π΄π΄π΄π΄π
π
οΏ½ where β’ ππ is the similarity metric (smaller values indicate greater similarity) β’ πΉπΉ is the rated thrust of the candidate engine β’ πΉπΉπ
π
is the rated thrust of the reference engine β’ πΈπΈπΌπΌπππΆπΆπ₯π₯πΌπΌπΌπΌ is the NOx emission index for the candidate engine under evaluation at the idle state β’ πΈπΈπΌπΌπππΆπΆπ₯π₯πΌπΌπΌπΌπ
π
is the NOx emission index for the reference engine at the idle state β’ πΈπΈπΌπΌπππΆπΆπ₯π₯π΄π΄π΄π΄ is the NOx emission index for the candidate engine at the approach state β’ πΈπΈπΌπΌπππΆπΆπ₯π₯π΄π΄π΄π΄π
π
is the NOx emission index for the reference engine at the approach state Table B-2 lists the Test Data Engines and the Like Engines that have calculated similarity metrics within 15 percent of the Test Data Engines.19 Table B-2 Test Data and Like Engines Test Data Engine Like Engine(s)
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B-4 Test Data Engine Like Engine(s) Similarity Metric (%)
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B-5 Test Data Engine Like Engine(s) Similarity Metric (%)
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B-6 Table B-3 U.S. Domestic Airline-Owned Aircraft with Like Engines Test Data Engine Like Engine Aircraft Type Airline Number of Aircraft Annual Operationsa 3RR028 (RB211535E4)
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B-7 Test Data Engine Like Engine Aircraft Type Airline Number of Aircraft Annual Operationsa 7B20) Southwest 45 195,640 4BR005 (BR700715A1-30)
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B-8 Table B-4 Engines/Aircraft With Greatest Emission Contributiona HC CO NOx Engine Model Aircraft %b Engine Model Aircraft %b Engine Model Aircraft %b CF6-6D DC10-10CF/(F)
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