Performance Estimations of a Pulse Detonation Engine with Exit Nozzle

The PDE exit nozzle maintains operating pressure and also controls operating frequency. Two parametric studies were performed for two flight Mach number (Minf) conditions of 0.8 and 3.0 and an altitude of 30 kft, in which the exit nozzle contraction ratio Rnc, was systematically varied from 1.6 to 6.4. For the supersonic flight Mach number of 3.0, fuel-specific impulse, Ispf, increases with increasing values of Rnc and attains a constant value of 1950 s for Rnc > 5.0. For the subsonic flight conditions of Minf = 0.8, Ispf increases with increasing values of the exit nozzle contraction ratio and attains a constant value of 1600 for an exit nozzle contraction ratio of 3.0. These parametric studies also quantified PDE operation parameters such as mass flowrates of air and fuel, frequency, and fill velocity. Two additional parametric studies were performed in which purge fraction and fill fraction were systematically varied and they show opposite effect on Ispf and thrust generated. The estimated Ispf was found to have a maximum of 1980 s at a flight Mach number of 3.0, and a minimum value of 1580 s, at a flight Mach number of 0.8 and an altitude of 30 kft.

[1]  Louis A. Povinelli,et al.  THERMODYNAMIC CYCLE AND CFD ANALYSES FOR HYDROGEN FUELED AIR-BREATHING PULSE DETONATION ENGINES , 2002 .

[2]  D. Spalding,et al.  INTRODUCTION TO COMBUSTION , 1979 .

[3]  D. Desbordes,et al.  Propulsive Performances of Pulsed Detonations , 1999 .

[4]  Venkat Eswarlu Tangirala,et al.  PULSED DETONATION ENGINE PROCESSES: EXPERIMENTS AND SIMULATIONS , 2004 .

[5]  S. Turns.  An Introduction to Combustion: Concepts and Applications , 2000 .

[6]  Thomas A. Kaemming,et al.  Reaction Ratio and Nozzle Expansion Effects on the PDE , 2003 .

[7]  William H. Heiser,et al.  Thermodynamic Cycle Analysis of Pulse Detonation Engines , 2002 .

[8]  J. V. Foa,et al.  Elements of flight propulsion , 1960 .

[9]  Shaye Yungster,et al.  Analysis of Nozzle and Ejector Effects on Pulse Detonation Engine Performance , 2003 .

[10]  Robert Stowe,et al.  Design Methodology for a Pulse Detonation Engine as a Ramjet Replacement , 2004 .

[11]  A. A. Borisov,et al.  Pulse detonation propulsion : challenges, current status, and future perspective , 2004 .

[12]  Joseph E. Shepherd,et al.  Analytical Model for the Impulse of Single-Cycle Pulse Detonation Tube , 2003 .

[13]  J. Anderson,et al.  Modern Compressible Flow: With Historical Perspective , 1982 .

[14]  Daniel E. Paxson,et al.  Optimal Area Profiles for Ideal Single Nozzle Air-Breathing Pulse Detonation Engines , 2003 .

[15]  D. Talley,et al.  The Constant Volume Limit of Pulsed Propulsion for a Constant Gamma Ideal Gas , 2002 .

[16]  Shmuel Eidelman,et al.  Pulsed detonation engine experimental and theoretical review , 1992 .

[17]  Venkat Tangirala,et al.  Thermodynamic and Unsteady Flow Considerations in Performance Estimation for Pulse Detonation Application , 2005 .

[18]  J. Anderson.  Modern compressible flow, with historical perspective - 2nd Edition , 1990 .

[19]  Joseph E. Shepherd,et al.  Reply to Comment on "Analytical Model for the Impulse of Single-Cycle Pulse Detonation Tube" by W.H. Heiser and D.T. Pratt , 2004 .

[20]  Thomas A. Kaemming,et al.  THE THERMODYNAMIC BASIS OF PULSED DETONATION ENGINE THRUST PRODUCTION , 2002 .

[21]  Charles L. Merkle,et al.  A numerical study of pulse detonation engine performance , 2000 .

[22]  Vigor Yang,et al.  Thrust Chamber Dynamics and Propulsive Performance of Single-Tube Pulse Detonation Engines , 2004 .

[23]  John Kentfield.  The Idealised Performances of Pulse-Detonation Engines from an Overall Performance Viewpoint , 2002 .

[24]  Paul Harris,et al.  Single-Tube Two-Dimensional Evaluation of a Pulse Detonation Engine as a Ramjet Replacement , 2004 .

[25]  Vigor Yang,et al.  System Performance and Thermodynamic Cycle Analysis of Airbreathing Pulse Detonation Engines , 2003 .

[26]  J. A. C. Kentfield.  Thermodynamics of Airbreathing Pulse-Detonation Engines , 2002 .

[27]  Charles L. Merkle,et al.  Multi-level analysis of pulsed detonation engines , 2000 .

[28]  Takuma Endo,et al.  A Simplified Analysis on a Pulse Detonation Engine Model , 2002 .

[29]  Thomas A. Kaemming,et al.  The Thermodynamic and Fluid Dynamic Functions of a Pulsed Detonation Engine Nozzle , 2004 .

[30]  R. Akbar,et al.  Performance of Pulse Detonation Engines , 2002 .