19–22 August 2019
JW Marriott, Indianapolis, Indiana

Liquid Atomization, Spray, and Fuel Injection in Aircraft Gas Turbine Engines

7-8 July 2018
0800-1700 hrs

Member - Early (until 18 June) $500
Member - Standard $600
Conference Rate $700

Register Here


Atomization of liquids is at the heart of operations of many of the devices we use on a daily basis. In the aerospace industry, the engine thrust, efficiency, and the emission levels are directly related to the performance of the liquid fuel injector designs. For this reason, R&D activities in this area have intensified in the past two decades in a quest to design and operate efficient and low-emission gas turbine engines. It is imperative then that individuals involved in research, design, and operation have the requisite knowledge and training to choose intelligent and innovative approaches when it comes to liquid fuel nozzle and its optimum performance.

This course provides an understanding of the processes of liquid atomization and spray formation and relating this understanding to fuel injection systems and emission of pollutants in modern engines. The approach in this course is to build sufficient background through introduction of a consistent and widely-used terminology in sprays and atomization. Justifications, reasons, and purposes of the liquid atomization and spray formation are discussed along with presentation of different designs of atomizers and nozzles employed in various industries. Characterization methods of sprays are discussed after the definition and meaning of different averaged liquid droplet diameters are touched on. Droplet size measurement devices are covered and examples are shown.

Learning Objectives 

  • Understand and be familiarized with important terminology commonly used in atomization and sprays
  • Gain a general physical understanding of the important processes in atomization and spray formation
  • Possess adequate background and foundation to educate yourself beyond the depth and topics covered
  • Be able to intelligently judge, adapt, and transfer technological advances from one discipline to the other
  • Understand effects of fuel nozzle design and operating conditions on engine performance, combustion, and emission of pollutants
  • Be able to communicate intelligently with engineers working on fuel nozzle and fuel system design aspects in your company
  • Grasp the technology and the logic behind different injector designs
  • Gain sufficient knowledge to intelligently contribute to humans' efforts in minimizing emission of pollutants and maximizing efficient usage of Earth's energy resources
  • Anticipate future trends and technology developments in fuel nozzles
  • Learn and appreciate the role the fuel nozzle plays in combustion and emission and how it is used to provide guidance in design of low-emission combustion systems
  • Effectively contribute to the design of the critical engine components affected by the fuel nozzle performance

Who Should Attend

Engineers working on the design of components for high efficiency and performance of combustion engines, particularly those directly and indirectly involved in reducing emission of harmful pollutants from combustion engines, will highly benefit from this course. Additionally, this course provides adequate background for engineers and managers in contact with those directly involved in the fuel nozzle systems. Therefore, this experience prepares the attendees for a more efficient and intelligent communication in an interdisciplinary technological environment. The course is also of interest to academicians wishing exposure to the field and those engineers active in development and applications of software, modeling in-cylinder injection combustion and emission processes.


Day 1
  • Description of the atomization process
  • Disintegration of the liquid jets
  • Disintegration of liquid sheets
  • Drop breakup in air flow, turbulent flow, and viscous flow
  • Types of atomizers and their design features
  • Spray drop size distribution and measurements
  • Drop and spray evaporation
Day 2
  • Fuel spray in the combustor confines
  • Spray flame in gas turbine combustors
  • Spray flame stabilization
  • Effects of fuel nozzle design and operating parameters on spray characteristics and combustor performance
  • Effects of fuel nozzle design and operating parameters on emission of pollutants
  • Matching of fuel spray with the combustor
  • Fuel nozzles for lean direct injection
  • Advanced concepts

Course Instructor

Dr. Bruce Chehroudi has accumulated years of technical and leadership experience in different capacities and organizations. This includes such positions as President at Advanced Technology Consultants, Principal Scientist and Group Leader appointment at the Air Force Research Laboratory (AFRL) ERCInc, a Chief Scientist at Raytheon STX, a Visiting Technologist at Ford's Advanced Manufacturing Technology Development (AMTD) center, a tenured Professor of Mechanical Engineering at Kettering University and University of Illinois, and served as a Senior Research Staff/Research Fellow at Princeton University. Dr. Chehroudi has directed numerous multimillion dollar interdisciplinary projects in areas involving chemically reacting flows, combustion and emission of pollutants, sustainable and alternative energy sources, distributed ignition, material/fuel injection, advanced pollution reduction technologies, propulsion concepts, gas turbine and liquid rocket engines, combustion instability, laser optical diagnostics, spectroscopy, supercritical fluids and applications in environmental and propulsion systems, advanced composites, MEMS, nanotechnology, and micro fluidics. He is an AIAA Associate Fellow.

Course Materials

Course notes will be made available about one week prior to the course event. Course registrants will receive an email with detailed instructions on how to access your course notes. Since these notes will not be distributed on site, AIAA and your course instructor highly recommend that you bring your computer with the course notes already downloaded.  


Please contact Jason Cole if you have any questions about courses and workshops at AIAA forums.

Dates to Remember

  • Manuscript Deadline: 15 Jul 2019
  • Early Mem Reg Deadline: 28 Jul 2019
  • Cancellation Deadline: 05 Aug 2019

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