... 2023 25 05 2023 ignition assistant glow plug jet fuel blends aircraft combustion stability alcohol-to-jet-fuel At the extreme ambient intake conditions for high-altitude aircraft operation, corresponding to low temperature and pressure, robust combustion is significantly...

...Luca Menegozzo; Ernesto Benini The present paper focuses on the numerical modeling approaches adopted in boundary layer ingestion (BLI) studies. Three driving aircraft concepts have been identified, namely propulsive fuselage concept (PFC), rear engines concept (REC), and distributed fans concept...

... and aircraft applications. The unsteady flow field that disturbs the flame consists not only of the incident transverse acoustic wave, but also longitudinal acoustic fluctuations and vortical fluctuations associated with underlying hydrodynamic instabilities of the base flow. We show that the acoustic...

...Marvin Zaluski; Sylvain Létourneau; Jeff Bird; Chunsheng Yang The CF-18 (CF denotes Canadian Forces) aircraft is a complex system for which a variety of data are systematically being recorded: flight data from sensors, built-in test equipment data, and maintenance data. Without proper analytical...

...Peter Gloeckner; Klaus Dullenkopf; Michael Flouros Operating conditions in high speed mainshaft ball bearings applied in new aircraft propulsion systems require enhanced bearing designs and materials. Rotational speeds, loads, demands on higher thrust capability, and reliability have increased...

... the oil flow to the air/oil separator, however, due to the oil flow distribution the thermal effects may lead to high material temperatures and to malfunctions in the engine’s lube system. 18 02 2010 22 06 2010 12 11 2010 12 11 2010 aerospace engines aircraft computational...

...Alexandros Terzis; Charilaos Kazakos; Nikolaos Papadopoulos; Anestis Kalfas; Pavlos K. Zachos; Pericles Pilidis The penetration of a jet of fluid into a traversal moving stream is a basic configuration of a wide range of engineering applications, such as film cooling and V/STOL aircrafts...

...Gyaebyung Yang; Daejong Park; Chun Taek Kim; Sejin Kwon Hydrazine monopropellant is often used with a spontaneous catalyst a high-performance aircraft emergency power unit (EPU) and in aerospace propulsion; however, it is toxic and requires special handling. A hydrogen peroxide ( H 2 O 2 ) -based...

...Michael P. Enright; Kwai S. Chan; Jonathan P. Moody; Patrick J. Golden; Ramesh Chandra; Alan C. Pentz Fretting fatigue is a random process that continues to be a major source of damage associated with the failure of aircraft gas turbine engine components. Fretting fatigue is dominated...

.... , 2007 , “ A Preliminary Parametric Study for Geared, Intercooled and/or Recuperated Turbofan for Short Range Civil Aircraft ,” ASME Paper No. GT2007-27234. Colmenares , F. , Gomez , J. , Pascovici , D. , and Ogaji , S. , 2007 , “ A Preliminary Feasibility Study for Future Aero...

...Michael T. Timko; Scott C. Herndon; Ezra C. Wood; Timothy B. Onasch; Megan J. Northway; John T. Jayne; Manjula R. Canagaratna; Richard C. Miake-Lye; W. Berk Knighton The potential human health and environmental impacts of aircraft gas turbine engine emissions during normal airport operation...

... to small sample sizes. 25 03 2009 06 04 2009 27 01 2010 27 01 2010 aerospace engines aircraft condition monitoring costing fault diagnosis gas turbines turbines diagnostics metrics cost curves confusion matrices In the past 10 years, interest has grown...

...M. Kelaidis; N. Aretakis; A. Tsalavoutas; K. Mathioudakis An aircraft mission analysis procedure, accounting for engine aging deterioration and incorporating emission estimation capability, is presented. It consists of three main modules: a flight simulation module, an engine performance simulation...

... acknowledge Alstom Aerospace and the UK Engineering and Physical Sciences Research Council for financial support via a CASE studentship award. This paper has presented details of the design and validation of a complex nonlinear real-time simulation model for a civil turbofan aircraft engine...

...-friction effects from the lubricant film and surfaces in contact, respectively. The test damper reproduces an aircraft application that must contain the lubricant for extended periods of time. The test damper journal is 2.54 cm in length and 12.7 cm in diameter, with a nominal clearance of 0.127 mm...

...Stefano Campanari; Giampaolo Manzolini, Research Engineer; Andrea Beretti; Uwe Wollrab In recent years, civil aircraft projects are showing a continuous increase in the demand of onboard electrical power, both for the partial substitution of hydraulic or pneumatic controls and drives...

...Jorge R. Camacho; Ahsan R. Choudhuri Buoyant and nonbuoyant shapes of methane flames issued from a 2:1 aspect ratio elliptic tube burner were measured. Nonbuoyant conditions were obtained in the KC-135 microgravity research aircraft operated by NASA’s Johnson Space Center. A mathematical model...

... is recommended for floating point applications as well. This study, carried out as part of the JTDE program provided significant insight into implementation issues associated with MVC’s. The benefits of this research were realized on the JPATS and Joint Strike Fighter programs aircraft programs. 4...

...Dilip R. Ballal 07 06 2004 biographies gas turbines combustion aerodynamics ignition heat transfer sprays aerospace engines aircraft flames Professor Arthur H. Lefebvre, an ASME Fellow and a member of IGTI’s Combustion and Fuels technical committee over three...

... to find those technologies representing the best compromise between performance improvement and technology risk. Finally, a practical demonstration of the method and accompanying results is given for a typical commercial aircraft engine technology selection problem. Contributed by the International...