Power, Propulsion and Thermal Management
Naval aviation creates several unique demands on aircraft power and propulsion systems. The operation from carriers and other ships requires higher thrust to both weight and airflow engines in highly integrated inlet and exhaust systems, along with greater variability in throttle settings and the need for more rapid throttle excursions for landing, wave-off and bolter events.
Propulsion systems and their associated power and thermal management sub-systems are critical to the performance, operability, readiness and life-cycle costs of naval air vehicles. Specifically, the speed and range of fighter and strike aircraft are strongly dependent on gas-turbine engines and their specific thrust and fuel efficiency. In addition, turbine-propulsion systems are the primary fleet-readiness driver and the largest cost in operational systems. Improvements in these propulsion-related systems have the greatest potential to increase aircraft range, speed operability, readiness and other positive mission capabilities while reducing life-cycle costs.
A current focus area is Next Generation Air Dominance (NGAD) enablers. Advancements in integrated propulsion, power and thermal managements are essential to meet desired warfighter needs for future carrier-based tactical fighter and strike aircraft.
Research Concentration Areas
Propulsion focus areas will provide innovative research and technology in: aircraft and weapons propulsion and combined-power propulsion for high speed, long endurance and responsiveness. Basic and applied research investments in: advanced thermodynamics cycles, engine/airframe integration, turbo-machinery and drive systems for enhanced performance and maintainability; advanced hot-section materials and coatings; small unmanned aerial vehicle propulsion and thermal management; and technologies to mitigate operations in austere environments.
NGAD enablers focus on maximum efficiency and specific thrust over a wide range of engine-operating conditions. Technology challenges include variable- and adaptive-integrated propulsion, power and thermal management, aerodynamics, aeromechanics, instrumentation, supervisory control, mechanical durability, high-temperature materials, turbine-heat transfer, and highly integrated inlets and exhausts.
Research Challenges and Opportunities
- Advanced thermodynamic cycles, including pressure-gain combustion
- Engine-airframe integration, including serpentine inlets and active- and/or passive-flow control
- Advanced, high-stage loading and efficient turbomachinery, including tip flows, casing treatments, distortion-tolerant fans and advanced methods in blade-disk aeromechanics
- Advanced cooling and thermal management for engines and auxiliary systems, including new concepts of heat collection, distribution and rejection
- Advanced materials, coatings and manufacturing science for hot- and cold-section engine components in naval environments. Durable thermal/environmental coatings for harsh, austere environments. Ceramic-matrix composites for naval-unique operating conditions
- Component interactions in steady and transient operations, including seals, bearings, engine auxiliaries and externals
- Power and/or propulsion for small, unmanned air vehicles, including small combustors, micro-heat transfer, bearings and other small gas-turbine and reciprocating-engine components critical for such applications
- Other areas leading to more power-dense, efficient, responsive, reliable and integrated power, propulsion and thermal-management systems
- Aerodynamics, aero-mechanics and control of variable/adaptive-engine technologies
- Adaptive fan technologies
- Supervisory control of adaptive-integrated propulsion, power and thermal management
- Ultra-high, power-density power and thermal managements
Type of Funding Available
- Basic Research
- Applied Research
- Advanced Technology Development
Program Contact Information
Submit white papers, QUAD charts and full proposals for contracts to this email address: ONR Code 35 Research Submissions
Follow instructions within BAA for submission of grant proposals to grants.gov website.