PROPULSION SYSTEMS HAZARDS

The JANNAF 29th Propulsion Systems Hazards Subcommittee meeting will address hazards and related technology areas for strategic missile, tactical missile, gun, and rocket propulsion systems. Papers are invited that (1) address all aspects of vulnerability and survivability, loading and firing hazards of propulsion systems, and weapon systems safety or (2) aid in synthesizing, interpreting, and validating current knowledge to make research and development results more useful to the design engineer. Meeting topics generally fall into two groups: (1) hazards evaluation and (2) hazards mitigation technology.

PSHS Mission Areas

Areas of interest included in the Call for Papers are:


Mission Area I: Thermal Decomposition and Cookoff

Chair:
Ms. Aubrey D. Farmer, NAWCWD/China Lake
Telephone:  (760) 939-7582
Email:          aubrey.farmer@navy.mil

  • Thermal Decomposition, Ignition, and Combustion: Fundamental experimental and modeling studies of decomposition of ingredients and propellants (including kinetics, mechanisms, microstructure, and thermochemistry); ignition of ingredients and propellants (including ignition mechanisms, ignition transients, and effects of heating rate); combustion of ingredients and propellants (including burn rate, pressure exponent, and temperature sensitivity; understanding of the microstructural combustion zone, chemistry and heat release; burning in cracks, defects, and thermally damaged materials; convective combustion and DDT); characterization of thermally damaged materials; coupled thermal-chemical-mechanical modeling of cookoff. (Papers in this area will be considered for joint PSHS/CS sessions.)
  • Cookoff Hazards Assessment and Mitigation: Cookoff response of propulsion systems and components; cookoff mitigation technologies; threat/hazards assessment (THA) of cookoff scenarios; relationships between THA and cookoff test procedures; small scale test methodologies for predicting cookoff of full scale systems.

Mission Area II: Impact/Shock-Induced Reactions

Chair:
Dr. Joel B. Stewart, ARL/Aberdeen Proving Ground
Telephone:  (410) 278-6877
Email:          joel.b.stewart2.civ@mail.mil

  • Violent Reaction and Detonation of Rocket Propellants: Micro-characterization of XDT mechanisms and fundamentals associated with explosive response to impact and shock loadings; increased sensitivity to shock leading to detonation of damaged 1.3 propellants; shotgun testing; characterization of impact damage; detonation phenomena of aluminized (underwater) explosives; modeling approaches.
  • Hot Spot Initiation from Shock and Impact: Fundamental studies; scaling of fundamental physics to predict full scale events; experimental and theoretical studies of hot spot initiation and growth.
  • Detonation Phenomena: Modeling and experimental studies of shock-to-detonation transition phenomena; deflagration-to-detonation transition phenomena; delayed detonation phenomena; other detonation phenomena not covered above.
  • Response of Energetic Materials to Low Amplitude/Long Duration Impact/Shock Loading: Scenarios where this type of stimulus might be important include hard target penetrator warheads, solid propellant fallback/ground impact from launch vehicle failures, gun setback, shear induced reactions, and vulnerability of energetic materials to some kinetic energy penetrators. Also of interest is the development and use of small scale tests to simulate these types of impact/shock loading responses for full scale systems. Papers are also requested on diagnostics and experimental arrangements that support the understanding of reaction induced from low-amplitude, long-duration mechanical loading. These papers should focus on the measurement techniques (instead of the materials being tested) and how they produce data on the subject of interest. Examples of topics include techniques to measure material response (stress-strain vs. strain rates, cracking, etc.), reaction thresholds, and severity of reaction.

Mission Area III: Insensitive Munitions Technology

Co-Chairs:
Ms. Jamie M. Fisher, Army AMRDEC/Redstone Arsenal
Telephone:  (256) 876-5115
Email:          jamie.m.fisher2.civ@mail.mil

Mr. Stephen R. Struck, AFRL/Eglin AFB
Telephone:  (850) 882-3911
Email:          stephen.struck@us.af.mil

Technology of interest includes historical documentation of past insensitive munitions issues and their impact on system development; mitigation system design and function; insensitive munitions program and technology status reports; assessment of insensitive munitions response and pass/fail criteria; and relationships between small-scale and full-scale testing relative to insensitive munitions. Papers reporting present progress under SBIR insensitive munitions technology funding are also solicited.


Mission Area IV: Gun Propellant Vulnerability

Chair:
Mr. J. Kevin Boyd, ARL/Aberdeen Proving Ground
Telephone:  (410) 278-2505

Email:          james.k.boyd.civ@mail.mil

Any aspects related to the response of gun propellants, ammunition, and ammunition compartments to shaped charge jets, other penetrators, and spall; and new LOVA propellant technologies. (Papers in this area will be considered for joint PSHS/CS sessions.)


Mission Area V: Propulsion Systems Safety and Hazard Classification

Chair:
Dr. Josephine Covino, DDESB/Alexandria
Telephone:  (571) 372-6685
Email:          josephine.covino.civ@mail.mil

  • Hazard Classification of Large Solid Rocket Motors: Test methods/procedures, analysis techniques, experimental data and computer simulation results related to the assessment of hazard response of large solid rocket motors for hazard classification purposes. In particular, papers covering three hazard scenarios are of interest, including: (1) detonation/explosive reaction characteristics of various propellant families subjected to explosive shocks, for example critical diameter, shock sensitivity, and the relationship between the two parameters; (2) response of large SRMs in an engulfing fire or fast cookoff scenario; and (3) creation and effects of propellant damage on hazard response of large SRMs in impact and other accident scenarios.
  • Propulsion Systems Safety and Hazard Classification: Harmonization of Hazard Classification and Insensitive Munitions Testing, Issues identified by the service safety offices, Hazard classification issues, Differences between insensitive munitions and hazard classification and safety testing and standardization, Assessment of response and pass/fail criteria, Alternate test protocols and the role of small scale to full scale testing and hazard classification, and miscellaneous safety issues and programs.
  • Threat Hazard Assessment: MIL-STD-2105C allows variations in testing to stimuli more realistic to a given weapon system. These stimuli are defined by a threat hazard assessment of that weapon system. Papers describing threat hazard assessment methods and results are solicited.

Mission Area VI: Energetic Liquid Hazards

Chair:
Mr. Adam J. Brand, AFRL/Edwards AFB
Telephone:  (661) 275-5787
Email:          adam.brand@us.af.mil

  • Hazards characterization associated with energetic liquids either as part of bipropellant combinations, monopropellant formulations, or liquid ingredients in solid propellant formulations and their respective propulsion systems.
  • Identification and application of meaningful analytical/experimental methods for assessing hazard risk with energetic liquids, and the development and standardization of new test methods for assessing hazards in the different propulsion systems considered.

Propulsion Systems Hazards Subcommittee Chair

Mr. Kevin P. Ford, NAWCWD/China Lake
Telephone:   (760) 939-0380
Email:           kevin.p.ford@navy.mil

JHU WSE ERG Technical Representative

Mr. Andrew Taylor, JHU WSE ERG/Columbia
Telephone:  (410) 992-7306
Email:          ataylor@erg.jhu.edu