ACRP-Problem-No-10-02-16.pdf
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1、ACRP Problem No. 10-02-16 Recommended: Yes Reverse Thrust Characterization - Short Runways/Early Taxiway Exits ACRP Staff The scope intends to build on the taxiway noise study recently completed as ACRP project A11-02/Task 8, Enhanced Modeling of Aircraft Taxiway Noise, adding another component to t
2、he analysis as input to the FAAs integrated noise model. TRB Aviation Group Environmental Impacts of Aviation Cmte: This project could result in significant enhancement to noise modeling capabilties. Panel for Environmental Emphasis The Environmental Panel did not consider the scope in this problem
3、statement as a priority for ACRP research. ACRP Screening Panel Relevant topic, not necessarily a priority for ACRP research, but worthy of discussion. AIRPORT COOPERATIVE RESEARCH PROGRAM PROBLEM STATEMENT RRD 5 Topic: FY2010 Focus Area: A Vision for a Green Airport: mitigating aircraft noise A AC
4、CR RP P Problem Number Problem Number 10-02-16 I. PROBLEM TITLE Reverse Thrust Characterization Short Runways/Early Taxiway Exits II. RESEARCH PROBLEM STATEMENT Reverse thrust operations are used to decelerate aircraft during landing roll. This involves reducing engine speed, deploying aerodynamic d
5、evices to divert jet flow forward and advancing the throttles, increasing thrust again. The thrust increase and change in jet flow result in high noise levels with significant acoustic energy in low frequency range. At airports with short runways or runways that have early high speed taxiway exits t
6、hrust settings are higher than typical reverse thrust settings. In spite of recent enhancements on other features, the INM model is currently not capable capturing thrust reverser noise in detail, mostly because of lack of operational data on thrust reverser use, source noise strength, source spectr
7、a, and performance. This lack of data also limits the capability estimating fuel-burn and emissions. III. OBJECTIVE The objective of the research proposed is to provide several key products that could be used to improve the modeling methods used in the next generation of the FAAs environmental model
8、ing tools. . First, we seek to quantify thrust levels typically used during reverse thrust operations for both typical runway lengths and for airport with short runways or runways where aircraft decelerate quickly to use a high speed exit taxiway. Second, we want to characterize the spectrum and dir
9、ectivity of reverse thrust operations and of different reverser types. Third, we will evaluate spectral class and noise-power-distance (NPD) data currently in the INM and develop a new set for thrust reverser noise, using the new data where available. And finally, the fourth objective is to describe
10、 the long distance propagation characteristics of reverse thrust noise. IV. RESEARCH PROPOSED It is proposed that the research consist of two data collection efforts and associated data analysis. The first research effort would consist of collecting flight simulator data of aircraft landing operatio
11、ns using both short and long runways. A flight simulator for a modern single-aisle twin would be used for this study. Data collected would include time, distance, speed, altitude, thrust, and configuration from crossing threshold to reaching taxi speed. The second data collection effort would includ
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