FA8650-17-S-2002-Call1-Atch2.pdf

FA8650-17-S-2002, Call 001

Attch 2

“Dual Mode Ramjet Design Maturation”

Task Order 0001 Statement of Objectives

Overall Objectives: The objectives of this project are to mature a conceptual dual mode ramjet (DMRJ) design to a critical design level, construct the DMRJ test article, and perform both direct connect (DC) and inlet-integrated free-jet testing. Task Order 1 includes the critical design of the DMRJ.

The Task Order 1 critical design shall define test hardware appropriate for DC testing and testing as part of the existing CCE-LIMX integrated test rig. Low cost hardware that can be used during both DC and inlet-integrated free-jet testing is preferred. Primary and alternate DC test facilities shall be identified by the Contractor. DC hardware should be designed to be reconfigurable to enable demonstration of low-Mach ignition and combustion stability, and assessment of throttle capability (movement of shock train location within isolator) using both hydrocarbon-only and hydrogen-only fuel at the low Mach and low dynamic pressure conditions equivalent to those occurring in the free-jet facility. Due to these challenging test conditions, the DMRJ designs should also include an ignition system that can allow the DMRJ combustor to effectively function as a gas generator, in the event of insufficient combustor performance and operability (i.e. no self-sustained burning or no throttle capability within the limits of the free-jet inlet/isolator operability). Note that ignition approaches that are incompatible with operation in the free-jet facility (e.g. silane) shall not be considered. The DMRJ shall maintain interfaces to the existing components of the free-jet rig (inlet/isolator and support structure) and shall meet facility requirements/constraints associated with the primary and alternate DC test facility and free-jet facility.

The design may either include a purpose-built DMRJ-only nozzle, or may rely on the conceptual design of the CCE-LIMX Integrated Nozzle. Note that the CCE-LIMX Integrated Nozzle couples the DMRJ and the turbine engine.

A Preliminary Design Review and Critical Design Review with the government team, consisting of AFRL and NASA, shall occur during Task Order 1 of the project. Also provide a cost and schedule estimate for DMRJ DC testing to include hardware fabrication and testing at both primary and alternate test facilities no later than the Critical Design Review. Government team concurrence on Contractor-recommended primary and alternate DC testing locations, or recommendation to test at an alternative facility that was not recommended by the Contractor will be provided at, or shortly after Critical Design Review.

Direct Connect Test Conditions Provide the ignition and combustion envelopes of their DMRJ design including expected maximum back pressure (i.e. throttle) limits when integrated in the DC and free-jet facilities. Primary and alternate DC test facilities should be identified by the Contractor team. Designs shall meet facility requirements/constraints associated with both the primary and alternate DC test facilities. Provide the Government with all supporting engineering data used to create the performance model (i.e.

geometry/CAD files, CFD grids, RJPA input file, cycle deck, etc.). Note that combustion performance (thrust and combustion efficiency) is not an evaluation metric for the CCE-LIMX program. Designs will be evaluated on: ignition, sustained burning, and throttle capability (movement of shock train location within isolator) without exceeding the operability limits of the existing free-jet, as well as cost effectiveness and gas generator functionality.

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Compatibility with Free-jet Inlet Determine the required flowpath geometry of the DMRJ combustor using the existing free-jet test rig geometry (inlet/isolator and strongback) and inlet/isolator operability/performance conditions as a design constraint. The designs shall meet facility requirements/constraints associated with the free-jet facility. Also provide measurements for the maximum isolator backpressure, the shock train length and location, and exhaust properties at a station mutually agreed upon by the Government Team and the Contractor. The contractor may design the DMRJ and corresponding DC hardware to mate with a purpose-built DMRJ nozzle or may rely on the conceptual design for the existing government nozzle.

Critical designs will be evaluated on: ignition, sustained burning, and throttle capability (movement of shock train location within isolator) without exceeding the limits of inlet/isolator operability for the existing free-jet test rig as well as cost effectiveness.

Fuel and Ignition Provide a design for the DMRJ combustor and ignition system that includes, but is not limited to, supply pressure, temperature, flow rate, and quantity of any fluids that are required to achieve ignition and sustained operation at expected operating conditions. The DMRJ design should be reconfigurable to accommodate operation with both hydrogen-only and hydrocarbon-only fuel. As a mitigation approach to address the challenging desired operating conditions, the ignition system shall be designed to operate the DMRJ as an effective gas generator that can control shock placement, in the event of insufficient combustor performance and operability (i.e. no self-sustained burning or no throttle capability within the limits of the free-jet inlet/isolator operability). Additionally, develop a control system plant model that can be used integrated with the existing inlet controls model. Provide information related to any additional support systems required, such as fuel heaters, etc. Obtain fuel requirements and ignition agent restrictions from the Government Team. Note that ignition approaches that are incompatible with operation in the free-jet facility shall not be considered.

Cooling A DMRJ that employs either water-cooled or heat-sink geometry is preferred. Note any system-specific design requirements, such as water filtering, minimum pressure drop, valving, etc., as applicable. Note that the DMRJ critical design and its associated subsystems must be compatible with the existing free-jet hardware including, but not limited to, overall system weight, length, and interfaces.

Mass Properties and Materials Provide the overall weight and center of gravity (CG) location for the DMRJ design. The calculated weight and CG shall include any required heat shields or flowpath fairings that are deemed necessary based on the cooling analysis and/or combustor geometry. Document and receive concurrence from the Government Team on the material properties of the DMRJ and verify that DMRJ design adheres to the weight constraints imposed by the structural capability of the existing free-jet test rig.

Instrumentation Provide the Government Team with a comprehensive list of the required health monitoring and recommended diagnostic instrumentation, as well as performance/operability instrumentation, and shall identify their intended locations. Final instrumentation placement must be approved by the Government Team prior hardware fabrication during Task Order 2.

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Integration / Test Plan The DMRJ design shall maintain interfaces to the existing components of the free-jet rig (inlet/isolator and strongback) and shall meet facility requirements/constraints associated with the primary and alternate DC test facility and free-jet facility. Provide documentation for procedures to integrate the DMRJ critical design into the preferred and alternate DC test facility and free-jet facility, including lifting and attachment methods, as appropriate. Work with primary and alternate DC test facilities and the free-jet facility to identify the requirements for related interfaces, including, but not limited to, those between the DMRJ, free-jet isolator and strongback. Specify required facility equipment and any addition support systems required. Also identify and provide documentation related to all “keep out” zones. Provide a detailed test plan (number of test runs, test conditions, etc.) for DC testing, and work with the government team to develop a test plan for free-jet testing.

Government Furnished Information:

Previous test data, engineering drawings

Period of Performance:

The Task Order 1 technical period of performance is estimated at 6 months. Reporting shall be completed at the end of Task Order 1 and is estimated to take 3 months.

Funding Profile: Funding will be based on AFRL evaluation of proposals received. Contractor cost information shall be segregated by event if the task is expected to span more than one fiscal year.

Task Order 1

Amount $200k

CDRLs:

A001 – Scientific and Technical Reports (Final Report) – End of Tech Effort

A002 – Performance and Cost Report – Monthly

A003 – Funds and Man-hour Expenditure Report – Monthly

A004 – Contract Funds Status Report (CFSR) – Quarterly

A005 – Status Report – Monthly

A006 – Presentation Material – As Required

A007 – Engineering Drawings – As Generated

A008 – Computer Software Product – As Generated

A009 – Technical Report-Study/Services – As Generated

A010 – Software User Manual (SUM) – As Generated

A011 – Design Data and Calculations – As Generated

A012 – Test Plan – As Required

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Mailing Address: The Project Engineer for this work is identified below, along with the mailing address for submittal of data items, reports, etc.:

AFRL/RQHP

Attn: Alex Maag / Leslie Sollmann 2130 Eighth Street Wright-Patterson AFB, OH 45433-7251 Ph: (937) 255-7558 / (937) 255-3977

Security Operations Security (OPSEC) must be an integral part of our daily activities. As we maintain security on our future technologies that are vital to national interest, we must recognize and prepare for the threat poised against our technology. Department of Defense policies mandate a high degree of security throughout the acquisition process. However, heightened security awareness and threat-based countermeasures are particularly essential during the research and development phase when our technology is most vulnerable to espionage, sabotage, or exploitation. It is the obligation of each employee or persons involved on this contract be constantly aware of and strictly adhere to security requirements designed to protect sensitive unclassified and other information and resources produced by acquisition, research and development, and technological security efforts outlined in this SOO. The contractor shall ensure employees receive training and follow appropriate Operations Security (OPSEC) measures during the performance of the contract.