The JANNAF 51st Combustion Subcommittee meeting will include sessions on chemical combustion phenomena occurring within the interior of guns and combustors of solid, liquid, and airbreathing (including small or expendable turbojets) missile and space propulsion systems. Papers are also invited that will aid in synthesizing, interpreting, and validating current knowledge to make research and development results more useful to design engineers. Specific areas of interest are listed below:
Areas of interest included in the Call for Papers are:
Co-Chairs:
Dr. Michael J. Nusca, DEVCOM ARL / Aberdeen Proving Ground, MD
Telephone: (410) 278-6108
Email: michael.j.nusca.civ@army.mil
Dr. Eugene Rozumov, DEVCOM AC / Picatinny Arsenal, NJ
Telephone: (973) 724-4535
Email: eugene.rozumov.civ@army.mil
Mr. Michael A. Bonanno, NSWC-IHD / Indian Head, MD
Telephone: (301) 744-1440
Email: michael.bonanno@navy.mil
Experimental and modeling studies of ignition, flame spreading, and combustion of solid propellants in guns, mortars and novel gas generators are considered. These studies include the investigation of ignition and ignitability, flame spreading, high-loading density charges, combustion temperature sensitivity, transient combustion (axial and radial pressure waves), and gun barrel erosion under high-pressure gun chamber conditions. Burn rate measurements and techniques, novel gun propelling charge concepts, interior ballistics of grain/stick/disk/consolidated and traveling charges are also considered. Innovative ignition systems and materials, novel chemical igniters and propellant formulations, experimental and analytical techniques to support the production of gun propellants and igniter materials, muzzle flash and blast, mechanical behavior and integrity of propellants in dynamic pressure wave environments, combustion behavior of thermally and mechanically damaged propellant, modeling and studies of surface-coated and deterred propellants, improved gun erosion and ballistic efficiencies through propellant chemical formulations and additive manufacturing are among the many topics included in this mission area. Papers on gun propellant ignition and combustion and propellant vulnerability will be considered for joint CS/PSHS sessions. Technical sessions will be organized as will specialist session that are aimed at discussing new and urgent topics (see below for a list of current topics).
Specialist Sessions
CHEETAH Users Group:
As a follow-up to the CHEETAH workshop held at the 48th JANNAF CS Meeting in December 2017, the mission area chairs are soliciting technical presentations (presentation required but paper optional) that highlight applications of the CHEETAH model, observations and/or shortcomings of the model as documented by researchers, and extensions made or suggested to be made to the model for particular applications as performed by individual researchers. The organization of a CHEETAH specialist session will be based on the number of presentations received.
Extended Range Munitions: A majority of the services are proposing extended range munitions that will provide battlefield overreach for lethality (range) and terminal effects (velocity). Soliciting technical presentations (presentation required but paper optional) that highlight requirements for extended range munitions, mission objectives, gun muzzle blast and signature effects, gun propulsion options and post-launch propulsion (rocket motors and ramjets) options. The organization of an Extended Range Munitions specialist session will be based on the number of presentations received.
Gun Propellant Burnrate Determination: As a follow-up to the JANNAF Closed Bomb Round Robin (1982) and subsequent JANNAF Closed Bomb workshops (1998, 2005, 2010) the mission area chairs are soliciting technical presentations (presentation required but paper optional) that highlight new technologies, techniques, and facilities for gun propellant burn rate measurement over a wide range of pressures. Previous JANNAF workshops (reports available from the JDOC database and/or the area chairs) have addressed many of the topics for Closed Bombs (CBs) that require to be updated given new challenges we face in layered, deterred, surface-coated, and additively manufactured gun propellants. In addition, the science of felted–fiber NC combustible cartridge cases has not been fully revealed while at the same time new materials for munition cases such as foamed celluloid are arising. Much of the community is starting to rely upon strand burners (SB) as a replacement for the CB, and so arises the question of SB applicability, confluence, and overlap in light of CB facilities (i.e., pressure range). The relative ease at which SB samples are prepared and data (including visual) is taken in light of pressure range restrictions and/or overlap with CBs is likely to be a popular topic. The organization of a Gun Propellant Burnrate Determination specialist session will be based on the number of presentations received.
Chair:
Dr. Jonathan T. Essel, NAWCWD / China Lake, CA
Telephone: (760) 939-7272
Email: jonathan.t.essel.civ@us.navy.mil
Joint EPSS/CS Tutorial on Chemical Kinetics
Chemical Kinetics is fundamental to combustion processes that occur within rocket engines, solid rocket motors, air-breathing missiles, and the exhaust plumes they produce. The correct formulation of chemical kinetic mechanisms is essential to the accurate prediction and characterization of combustion performance, energy release, thrust produced, and observable signatures. However, discerning the chemical species, reaction mechanisms, and reaction rates that comprise the kinetic mechanism for a given set of propellant reactants is a complex activity that requires the complementary application of computational chemistry techniques and experimental measurements. This tutorial is intended to present the recent application of computational and experimental methods to determine new or updated chemical kinetic mechanisms of propellants of current interest to the signatures community. The presentations will be made in an open forum format to permit questions during each briefing so as to maximize information exchange and the edification of all attendees.
Co-Chairs:
Dr. Benjamin R. Wilde, AFRL / Eglin AFB, FL
Telephone: (850) 882-2147
E-Mail: benjamin.wilde@us.af.mil
Dr. Sushilkumar P. Koundinyan, DEVCOM ARL / Aberdeen Proving Ground, MD
Telephone: (732) 824-2624
Email: sushilkumar.p.koundinyan.civ@mail.mil
Mr. Gerrit T. Sutherland, DEVCOM ARL / Aberdeen Proving Ground, MD
Telephone: (410) 306-1382
Email: gerrit.t.sutherland.civ@army.mil
Investigations related to detonation and blast performance are sought. Topics ranging from detonation propagation, chemical species formed from the detonation, and combustion processes following the detonation are appropriate for this area. Experimental, theoretical, and computational studies are encouraged that address diverse subjects including; detonation properties, metal driving, enhanced blast, Chem/Bio defeat, target response, underwater blast, and blast protection.
Papers elucidating how new or existing energetic materials and/or novel munitions designs can be exploited are of interest. New experimental techniques, advanced diagnostics and new modeling capabilities that are applicable to the dynamic conditions inherent in detonation events are of interest to this community. Reports of propellant technologies that are applicable to explosive performance are also encouraged.
Of particular interest to this mission area are enhanced blast technologies. Investigations of combustion of detonation products, added fuels, and reactive material dispersal for enhancing blast effects in open-air and various confined structures are sought. Targets of interest include tunnels, caves, multi-room structures, and blast chambers. Papers reporting experimental, theoretical, and computational efforts specifically geared toward understanding the non-ideal, post-detonation energy release phenomena are requested. Papers concerning enhanced blast technologies that exploit novel explosive formulations, non-detonative energetic materials, and munitions designs are of interest.
Specialist Session
High Fidelity Modeling of Reactive Materials: The development of predictive modeling capabilities is required to assess performance and design reactive material (RM) formulations that have the desired chemical and physical properties. Models include continuum mechanics-based predictive code (with input from atomistic and mesoscale submodels) with parameters derived from experimental data obtained from measurements of constitutive behavior as a function of strain, strain rate. The mission area chairs are soliciting technical presentations (presentation required but paper optional) that highlight high fidelity modeling efforts focused on the linkage between mechanical properties and energy release phenomenology of RM. The organization of a Reactive Materials specialist session will be based on the number of presentations received.
Co-Chairs:
Dr. Mark R. Gruber, AFRL / Wright-Patterson AFB, OH
Telephone: (937) 255-7350
Email: mark.gruber.1@us.af.mil
Mr. Matthew R. Gazella, AFRL / Wright-Patterson AFB, OH
Telephone: (937) 255-2726
Email: matthew.gazella@us.af.mil
Airbreathing Combustion: Theoretical and experimental investigations of subsonic, supersonic, and hypersonic combustion phenomena for airbreathing systems (including small or expendable turbojet engines) are considered. Specific topics of interest include: analytical and experimental (including CFD) determination of combustor flowfield characteristics; connected-pipe testing, freejet testing, and scaling analyses to free-flight conditions; experiments and analyses relating to ignition, mixing and combustion in liquid-fuel, gel/slurry-fuel, and solid-fuel ramjets, gas generator (ducted rocket) combustors, scramjets, and combined cycle engines; the use of ignition and combustion enhancement techniques; studies of liquid and gel/slurry fuel injection, spray formation, vaporization, and combustion processes; the measurement and analysis of combustion instability phenomena; investigation of the formulation, properties, and combustion of high energy-density single- and multi-phase fuels, including boron and other metal-burning slurries and gels; fundamental investigations of airbreathing combustion. (Papers in this area will be considered for joint CS/APS sessions.)
Chair:
Dr. Jeffrey S. West, NASA MSFC / Huntsville, AL
Telephone: (256) 544-6309
Email: jeffrey.s.west@nasa.gov
This area seeks to bring together the non-intrusive flow field diagnostics and computational fluid dynamics (CFD) communities to create an interaction beneficial to both. Papers are sought from the flow field diagnostics community on the development and implementation of new or existing instrumentation relevant to any combustion problem. Emphasis is placed on methods producing data required for code verification. Similar papers are sought from the computational community emphasizing measurement needs and uncertainties required for verification of existing CFD codes. This interaction is expected to result in development of new instrumentation for combustion research, methods designed specifically for high confidence measurements of critical CFD parameters, and new approaches for creating computational models.
Specialist Session
Enhancing Synergy between Flowfield Diagnostics and Computational Modeling: We envision hosting a specialist session which will focus on the benefits of, and desire for, enhancing synergy between flowfield diagnostics and computational modeling. The relationship between diagnostics and modeling is inherently symbiotic. However, we see a gap in communication between the two communities. Developers of diagnostics need to better understand what modelers require (and to what fidelity) to provide useful data. Modelers need to better understand what flowfield diagnostics can offer currently, and how they might be further developed to provide greater value.
We view participation from both the flowfield diagnostics and modeling communities as key, and therefore anticipate inviting speakers representing both communities and advertising the session to attract the targeted audiences. From a diagnostics perspective, practitioners of non-intrusive on-body and off-body diagnostics would be targeted, but not exclusively. Also, although part of the Combustion Subcommittee, we envision this session representing and attracting diagnosticians and modelers across the broader community including combustion/propulsion, aerodynamics, and structural disciplines.
Co-Chairs:
Mr. Joel W. Robinson, NASA MSFC / Huntsville, AL
Telephone: (256) 544-3513
Email: joel.w.robinson@nasa.gov
Mr. A. Paul Zuttarelli, AFRL / Edwards AFB, CA
Telephone: (661) 275-6786
Email: anthony.zuttarelli@us.af.mil
This topic area solicits summaries of work planned, underway, or completed to support state of the art and emerging propellant formulation development for evolving, non-traditional mission applications as well as traditional applications. Primary applications of interest are in aerospace propulsion but would also include primary or auxiliary power system application developments reliant upon rapid gas generation.
Dr. Heather F. Hayden, NSWC-IHD / Indian Head, MD
Telephone: (301) 744-4212
Email: heather.f.hayden.civ@us.navy.mil
Dr. Ghanshyam L. Vaghjiani, AFRL / Edwards AFB, CA
Telephone: (661) 275-5657
Email: ghanshyam.vaghjiani@us.af.mil
Mr. Nicholas Keim, JHU WSE ERG / Columbia, MD
Telephone: (443) 718-5005
Email: nkeim@erg.jhu.edu
Mr. Peyton Nanney, JHU WSE ERG / Columbia, MD
Telephone: (443) 718-5007
Email: pnanney@erg.jhu.edu