MIT Aero Astro  




Open rotor noise impacts are the focus of PARTNER Project 35



















PARTNER has released a report on sonic boom noise simulation

PARTNER launches new projects, publishes new reports

October 15, 2010 — The Partnership for AiR Transportation Noise and Emission Reduction has extended its research to include new projects on noise, particulate matter, and aircraft operations. Recently published PARTNER reports focus on greenhouse gas emissions, sonic/subsonic noise simulation, and noise health impacts.

New projects
• Open rotor noise impacts in proximity to airports are the subject of Project 35 research. Prop and prop-fan aircrafts' efficiency is generating significant interest by manufacturers and operators. PARTNER researchers are quantifying potential noise metrics to apply to engine architecture as new designs are developed.

• The FAA is committed to the development of continuous lower energy, emissions, and noise (CLEEN) technologies for civil subsonic jet airplanes. Project 36 will demonstrate how a software tool, under development in PARTNER Project 14, could help assess technologies proposed under the CLEEN program.

• Aviation and environmental regulators in the US and Europe want to promulgate an Aerospace Recommended Practice for aircraft non-volatile particulate matter by December 2011. Building on studies conducted by PARTNER Projects 29 (aviation sources emissions characteristics) and 34 (international collaborative emissions studies), Project 37 will work with the regulators on the research leading to creation of this standard.

• Many current aircraft noise guidelines are based primarily on outdoor sound levels. However, human perception is largely based on indoor response. Project 38 will examine how insight into how typical dwelling envelopes affect indoor sound levels due to non-sonic boom aircraft noise. It will offer improved tools for modeling and assessing aircraft noise propagation through typical dwellings and create a. database of typical construction types around U.S. airports.

Continuous Descent Arrival is a PARTNER-developed procedure where aircraft descend directly from altitude without the traditional leveling off in a series of steps, saving fuel, reducing noise at ground level, and saving time. The FAA wants to include CDA criteria for altitude and speed in its Terminal Area Route Generation Evaluation and Traffic Simulation program, and the MITRE Corp. has proposed a flight management simulation tool to support this. Project 39 will evaluate this tool and, if required, make recommendations for improvement.

• Continuous Descent Arrival, as mentioned above, has been tested at several major airports. However before CDA can see widespread adoption, it is critical to investigate its operational feasibility for heavy traffic scenarios. Project 40 will help the FAA quantify CDA's potential fuel savings and economic benefits.

• Aircraft black carbon emissions at cruise impact the climate and may affect human health. Project 41 (webpage to be posted shortly) will synthesize existing knowledge of aircraft black carbon emissions at cruise altitude, and improve estimates of emissions through data analysis and combustion modeling.

Recent reports
PARTNER has published several new reports on the topics of noise and emissions:

A Review of the Literature Related to Potential Heath Effects of Aircraft Noise. PARTNER Project 19 final report. Hales Swift
Sonic Boom and Subsonic Aircraft Noise Outdoor Simulation Design Study. Victor W. Sparrow, Steven L. Garrett. A PARTNER Project 24 report.
Life Cycle Greenhouse Gas Emissions from Alternative Jet Fuels. Russell W. Stratton, Hsin Min Wong, James I. Hileman. A PARTNER Project 28 report.

Each may be downloaded from the Reports section of the PARTNER website and from each projectís webpage.

Comments, information, questions:
Bill Litant
PARTNER communications director

To unsubscribe from PARTNER News, email with the word "unsubscribe" in the subject line.

Partnership for AiR Transportation Noise and Emissions Reduction
An FAA Center of Excellence
Masachusetts Institute of Technology
37-395 77 Massachusetts Ave.
Cambridge, MA 02139 USA