1. Investigation of Effects of Piston-prop Aircraft Engine Combustion Efficiency on The Human Health Damage
Assos. Prof. Onder ALTUNTAS, PhD.
Anadolu University
Faculty of Aeronautics and Astronautics
Department of Airframe and Powerplant Maintenance
5th MacroTrend Conference – Paris 2017

2. Outline of Presentation
Introduction
Methodology
Assessment
Results
Conclusion Remarks

3. Introduction What is Piston-prop Engine?
Piston-prop is a combination of internal combustion engine with propeller.
It is widely use (3/4 of all around the World) in aircraft to produce power, and rotate the propeller.
Basic scheme of piston-prop system is shown in below.
Redactor
Fuel
Piston Engine
Propeller

4. Aviation responsible 2-3% of anthropogenic CO2 emission presented in
“Aviation and the global atmosphere”
published by
IPCC – Intergovernmental Panel on Climate Change – 1999
published
Aviation sector will be grow about %5 per year
Fleet is about 30,000 by 2028
Beside, Some Health problem, caused by aviation sector, is very important. Such as; Resp. Organics, Resp. Inorganics, Carcinogens, etc.

5. Methodology and Assessment
Minimize the magnitude of pollution
Conserve non-renewable resources
Conserve ecological systems
Develop and utilize cleaner technologies
Maximize recycling of materials and waste
Apply the most appropriate pollution prevention and/or abatement techniques
Methodology and Assessment
Human Health, Environment and Resources

6. Ref. https://sites.google.com/site/lciarecipe/project-definition

7. Results There is some assumptions for all calculations.
CO, H2, unburned hydrocarbons, and particulates are critical parameters for piston-prop aircraft engines, because they affect the combustion efficiency. So, these emissions, especially CO, were input parameters for this study.
According to AF (Air-to-fuel) ratios, which were selected at lean mixture areas, combustion efficiency and human health damage have been calculated, separately, in a constant fuel consumption.

8. AF Ratio (%)
CE (%)
HH Damage (DALY)

9. Conclusion remarks
Max. HH Damage     1.09E-06 DALY at 98.84% CE and 15 AF ratio
Min. HH Damage     1.08E-06 DALY at 86.31% CE and 14 AF ratio
The calculations show that HH damage increases with increasing inefficiencies and decreasing AF ratio.
According to this study, to prevent health of all people, aircraft engine manufacturers should choose high efficient combustion chamber and low AF rations in their engine design.

10. Thanks your attentions.
Assoc. Prof. Onder ALTUNTAS PhD.
for your feedback