The JANNAF 35th Airbreathing Propulsion Subcommittee sessions will discuss technical problems and issues associated with airbreathing propulsion systems for application to missiles, launch vehicles, aerospace planes, and remotely piloted vehicles. These include technology, components, and engines within the turbojet, ramjet, scramjet, and combined cycle families. Session topics include characterization of system performance, engine cycle analysis and testing, engine design, engine/airframe integration, thermal management, fluid and structural mechanics, advanced engine structures and materials, fuel control systems, and characterization of advanced airbreathing fuels.

APS Mission Areas

Areas of interest included in the Call for Papers are:

Mission Area I: Conventional Ramjet Propulsion

Mr. John B. Moore, NAWCWD/China Lake
Telephone:  (760) 939-7006

  • Ramjets: Welcome are papers either of experimental or theoretical studies related to solid, liquid, and gaseous (aka Ducted Rocket) fueled ramjet systems or the constituents thereof. By example, topics at the component level include techniques for mixing enhancement, active and passive control, plume signature reduction, instability and fuel studies. Whether at the component, section, or system level the author should emphasize isolated/installed level performance benefits.
  • Mode Transition: Welcome are papers that address mode transition either to or from that of conventional Ramjet operation, e.g., Boost to Conventional Ramjet or Subsonic to Supersonic Combustion. Papers should emphasize the technology that assists in this transition.
  • Technologies with a Ramjet Application: Also welcome are papers that address technologies applicable to Ramjet systems, e.g., Manufacturing Technologies and Fabrication Techniques, etcetera. Papers need not be associated with a particular system but should be applicable to materials associated with such vehicles and their corresponding flight environment.

Mission Area II: Scramjet Propulsion

Dr. Aaron H. Auslender, NASA-LaRC/Hampton
Telephone:  (757) 864-6545

  • Fundamental CS) and Applied Technology: Fundamental and applied supersonic and hypersonic airbreathing propulsion technology and systems, particularly as related to existing technology development and demonstration programs. Development of scramjet propulsion technologies, whether or not related to a particular program or system, will also be of interest. (Papers in this area will be considered for joint APS/CS sessions.)

Specialist Session:

Hypersonic R&D Overview: Abstracts are requested for an overview session reviewing current activities in hypersonic R&D. Technical papers are not required but may be submitted in addition to the presentations

Mission Area III: Scramjet Propulsion/Structures

Mr. Brett Hauber, AFRL/WPAFB
Telephone:  (937) 255-7394

  • Propulsion Structures and Materials: Structures and materials technologies for enhancing and enabling current and future airbreathing propulsion concepts and systems. Topics of interest include: cooled and uncooled propulsion related structures and materials such as engine and nozzle flowpaths, combustion chambers, rotating components, combustor liners, hot ducts, insulation concepts, injectors and nozzles and attachment and joining techniques. Papers on structures and materials that have recently flown, or are planned for flight, on flight vehicles are encouraged.
  • Manufacturing Technologies and Fabrication Techniques: Papers are requested that emphasize manufacturing technologies and fabrication techniques. Papers need not be associated with a particular system but should be applicable to materials associated with such vehicles and their corresponding flight environment. Papers on additive manufacturing applicable to scramjets are also encouraged.
  • Airframe Structures and Materials: Materials development and characterization, and structural concepts, design, test, and validation for airframe applications and components exposed to extreme environments as found in atmospheric high speed or reentry conditions. Topics of interest include: TPS and Hot Structures, materials and structures and related technology for leading edges, exterior acreage surfaces, control surfaces, hot structures, and seals (penetrations). Further topics include: hot and integrated structures; acreage thermal protection systems, including ceramic matrix composites, tiles, blankets, ablators, and metallics; fuel tanks, including cryogenic and hydrocarbon, composite and metallic; leading edges, including active, passive, and heat-pipe-cooled; design and analysis methods; and seals. Papers are also encouraged on structures and materials for flight vehicles, either those that have flown or are planning to fly.

Mission Area IV: Scramjet Component/Engine Testing

Dr. Thomas A. Jackson, AFRL/WPAFB
Telephone:  (937) 255-7083

Maturation of Fully Integrated, Prototype Propulsion Systems: Physical experiment and numerical approaches to scramjet engine maturation from component development through flight test experiments of fully integrated, prototype propulsion systems are the focus of this area. Current practice for developing scramjet engines blends physical ground and flight test experiments with numerical simulation, applied first to components, then to partial engine flow-paths, and concluding with tip-to-tail simulation and/or limited flight experiments on fully integrated engines. Papers are solicited in the following areas of interest: impact of vitiation and other test air contaminants on the development process and the prediction of in-flight performance; performance, operability, and durability assessments from ground and flight experimental data (component and full engine evaluation); instrumentation strategies for both steady and transient performance and operability; instrumentation strategies for validating test and analysis with progressively more complex and integrated flow- paths; evaluation of engine transitions (ignition, acceleration, combustion mode transition, etc.); development of test techniques to enhance ground test capability; facility-to- facility and facility-to-flight variations and their considerations for the engine development process; prioritization of matching ground test parameters to flight conditions; uncertainty assessments of ground and flight test measured and deduced parameters and of numerical analysis (including component and engine performance, operability, and durability). (Papers in this area will be considered for joint APS/CS sessions.)

Mission Area V: Combined/Advanced Cycle Propulsion


Dr. Charles J. Trefny, NASA-GRC/Cleveland
Telephone:  (216) 433-2162

Mr. Glenn W. Liston, AFRL/Arnold AFB
Telephone:  (312) 340-3645

Fundamental and Applied Technology: Combined, combination, and advanced cycle airbreathing propulsion technology and systems. Of particular interest are analytical and/or experimental research regarding: 1) integration of multiple propulsive cycles; 2) methods for overcoming practical limitations (e.g. turbine-to- scramjet mode transition); 3) variable gas turbine cycles; 4) exploration of airbreathing propulsive cycles other than the Brayton cycle; and 5) system-level evaluations and payoff assessments. (Papers in this area will be considered for joint APS/CS sessions.)

Mission Area VI: Small/Expendable Turbopropulsion

Dr. Barry V. Kiel, AFRL/WPAFB
Telephone:  (937) 255-7272

Basic Technology and System Applications: Small and expendable turbopropulsion technology and systems related to missiles, drones, UAVs, and JETEC. (Papers in this area will be considered for joint APS/CS sessions.)

Mission Area VII: Fuel Technology

Mr. Richard W. Wills, AFRL/WPAFB
Telephone:  (937) 255-3113

Fundamental and Applied Technology: Fuels and propellants R&D for conventional and advanced cycle airbreathing propulsion, as applied to missiles, launch vehicles, and advanced aircraft for global reach applications. Conventional non-expendable turbine- powered aircraft are excluded from this call. (Papers in this area will be considered for joint APS/CS sessions.)

Mission Area VIII: Component Modeling Simulation

Dr. Mark A. Hagenmaier, AFRL/WPAFB
Telephone:  (937) 255-7325

Dr. Richard L. Gaffney, NASA-LaRC/Hampton
Telephone:  (757) 864-7872

  • Data for Propulsion Simulation Code Validation: Papers summarizing data for airbreathing propulsion code validation are requested which summarize new data and/or existing collections of data. The validation data may represent fundamental physics, propulsion system component operation, propulsion system unit problems, or system data. The physical phenomena investigated may include shock boundary layer interactions, multi-phase flow, turbulent flow, combustion, electromagnetic flow interactions or thermal protection systems. Fundamental thermodynamic data on physical properties of fluids including ionized gasses to supercritical fluids are also of interest. (Papers in this area will be considered for joint APS/CS sessions.)
  • Methods for Propulsion Component Analysis: Methods suitable for propulsion system analysis are solicited. These methods may be new methods or evaluations of existing methods. The methods may range from CFD simulation methods to integral cycle codes. Methods for efficient and/or accurate modeling of turbulent flow, combustion systems, ionized flow interactions, or multi-phase flow in the subsonic to hypersonic speed range are desired. Another issue of importance is methods for the integration of component models into a larger system simulation. (Papers in this area will be considered for joint APS/CS sessions.)

Mission Area IX: Advanced Combustion Control

Ms. Alana Jane Spurling, NAWCWD/China Lake
Telephone:  (760) 939-2941

Fundamental and Applied Technology: Papers are requested to advance active combustion control technology for airbreathing propulsion engines. Combustion control includes issues such as NOx control, pattern factor control, blowoff control, combustion dynamics control, and mode transition in combined-cycle, launch-vehicle propulsion systems, and combustion control on flight systems. Three main areas of particular interest are: the need for CFD codes to incorporate time accurate transient solutions to model actively controlling combustion; the need for sensors and actuators that are robust, responsive, inexpensive, and light enough to be used in flight for active combustion control; and the need to catalogue sources of suitably characterized sensors and actuators to actively control combustion in air breathing propulsion applications.

Airbreathing Propulsion Subcommittee Chair

Mr. Lawrence D. Huebner, NASA-MSFC/Huntsville
Telephone:  (256) 544-5246

Airbreathing Propulsion Subcommittee Deputy Chair

Dr. James W. Weber, AFRL/WPAFB
Telephone:  (937) 713-9912

JHU WSE ERG Technical Representative

Mr. Bryan S. DeHoff, Aerospace Technical Services/West Chester, OH
Telephone:  (513) 378-7071