SITIS Archives - Topic Details
Program:  SBIR
Topic Num:  N07-069 (Navy)
Title:  Pulse Detonation Engines Cycle Analysis and Performance Prediction Code
Research & Technical Areas:  Air Platform, Ground/Sea Vehicles, Weapons

Acquisition Program:  Tomahawk
  Objective:  Develop generic pulse detonation engine cycle efficiency and integrated systems performance code for a broad spectrum of Pulse Detonation Engines (PDE) applications. Develop simplified component models that can be integrated in the systems code to provide a user-friendly basic design tool.
  Description:  Pulse detonation engines offer the potential of propelling weapons/vehicles from subsonic to supersonic speeds utilizing a relatively simple and scaleable configuration without ejecting boosters. This can be achieved within a relatively short development period and with lower cost. However, in order for the PDE technology to compete with conventional turbojet, ramjet and scramjet technologies, the performance merit has to be established. Since PDE operates on a much more efficient constant volume Humphrey cycle (as opposed to constant pressure Brayton cycle utilized in gas turbines), and multi-cycle, multi-tube configurations are possible, improved performance and decreased fuel consumptions are possible. Detailed numerical simulations done over the past decades give an insight into the detonation process, its confinement, propagation and control. Reduced chemistry and mechanisms have been used in the reactive flow simulation. It is proposed to develop a system analysis and performance mapping code that can be utilized by designers to perform studies of basic configurations for various applications. This will enable sponsors to make educated investments on the technology, and tailor configurations to applications. Instead of time-consuming, elaborate, numerical simulations on super computers and massive parallel processors, this project will provide a user-friendly modeling tool for the design and development engineer for design and manufacture of PDEs.

  PHASE I: Develop simplified models for the various components, such as inlet, detonation tube, exit nozzle, as well as the fuel vaporization, deflagration to detonation transition processes, and direct fuel injection for detonation. Develop transient cycle code.
  PHASE II: Develop integrated performance models considering mainframe integration, optimization of thrust to weight ratio, fuel consumption, detonation chamber length, firing sequence etc; and provide a system code that can be applied for basic configurations for a variety of applications.

  PHASE III: Develop geometry-specific performance and design codes for a weapon and a vehicle configuration (e.g.: Tomahawk, UAV) PRIVATE SECTOR COMMERCIAL POTENTIAL/

  DUAL-USE APPLICATIONS: PDEs are presently considered by industry for aircraft propulsion and several other applications. As this technology matures, it can benefit commercial aviation. Reduction in operational (fuel and maintenance) cost will favor reduced cost per passenger mile.

  References:  1. Roy, G.D., Frolov, S.M, Borisov, A.A., and Netzer, D.W., “Pulse Detonation Propulsion: Challenges, Current Status, and Future Perspective,” Progress in Energy and Combustion Science 30 (2004), pp. 545 – 672 2. Combustion Processes in Propulsion: Control, Noise, and Pulse Detonation, (Ed. G.D. Roy) Elsevier, Oxford, UK, 2006.

Keywords:  Combustion, Detonation, Missile Propulsion, Aircraft Propulsion; Specific Impulse; Fuel Consumption

Questions and Answers:
Q: 1. Phase I work has lots of work: develop simplified models for the various of components such as inlet, detonation tube, exit nozzle as well as fuel vaporization etc. Do you mean we can choose few topics from this list, or we have to do all the topics in the list?

2. Do you request to develop a new code for detonation?
A: 1. Only within the scope of Phase I time and funding. If only one component is done it must be the detonation tube. Inlet-tube-nozzle will be desirable.

2. Detailed detonation codes are already there. A simplified code is desired so that a designer can use the codes.
Q: 1. In "Description", please explain what is meant by "performance mapping code".

2. Also, in "PHASE I:", is the intent of "developing simplified models" to produce illustrations or computer model simulations?
A: 1. Performance Mapping Code - An user-friendly code that can be used to predict performance at various operating conditions, (such as a parametric study).

2. Developing simplified models that can be used by a designer with a relatively short usage time (not a rigorous numerical simulation that requires special skill and uses long computer times).
Q: 1. Phase I work has lots of work: develop simplified models for the various of components such as inlet, detonation tube, exit nozzle as well as fuel vaporization etc. Do you mean we can choose few topics from this list, or we have to do all the topics in the list?

2. Do you request to develop a new code for detonation?
A: 1. Only within the scope of Phase I time and funding. If only one component is done it must be the detonation tube. Inlet-tube-nozzle will be desirable.

2. Detailed detonation codes are already there. A simplified code is desired so that a designer can use the codes.
Q: 1. In "Description", please explain what is meant by "performance mapping code".

2. Also, in "PHASE I:", is the intent of "developing simplified models" to produce illustrations or computer model simulations?
A: 1. Performance Mapping Code - An user-friendly code that can be used to predict performance at various operating conditions, (such as a parametric study).

2. Developing simplified models that can be used by a designer with a relatively short usage time (not a rigorous numerical simulation that requires special skill and uses long computer times).

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