Analytic Aerothermodynamic Cycle Model of the Combustion Wave Rotor in a Gas Turbine Engine

2006 ◽  
Author(s):  
Pezhman Akbari ◽  
Razi Nalim ◽  
H. Li
Keyword(s):  
Gas Turbine ◽  
Combustion Wave ◽  
Gas Turbine Engine ◽  
Wave Rotor ◽  
Cycle Model ◽  
Turbine Engine

scholarly journals Assessment of Combustion Modes for Internal Combustion Wave Rotors

1999 ◽  
Vol 121 (2) ◽  
pp. 265-271 ◽  
Author(s):  
M. R. Nalim
Keyword(s):  
Gas Turbine ◽  
Combustion Wave ◽  
Mode Selection ◽  
Internal Combustion ◽  
Combustion Mode ◽  
Wave Rotor ◽  
Turbine Engine ◽  
Reasonable Time ◽  
Wave Rotors ◽  
Combustion Modes

Combustion within the channels of a wave rotor is examined as a means of obtaining pressure gain during heat addition in a gas turbine engine. Three modes of combustion are assessed: premixed autoignition (detonation), premixed deflagration, and non-premixed autoignition. The last two will require strong turbulence for completion of combustion in a reasonable time in the wave rotor. The autoignition modes will require inlet temperatures in excess of 800 K for reliable ignition with most hydrocarbon fuels. Examples of combustion mode selection are presented for two engine applications.

Wave rotor optimization for gas turbine engine topping cycles

1996 ◽  
Vol 12 (4) ◽  
pp. 778-785 ◽  
Author(s):  
Jack Wilson ◽  
Daniel E. Paxson
Keyword(s):  
Gas Turbine ◽  
Gas Turbine Engine ◽  
Wave Rotor ◽  
Turbine Engine

Wave-Rotor Pressure-Gain Combustion Analysis for Power Generation and Gas Turbine Applications

2012 ◽  
Author(s):  
Manikanda Rajagopal ◽  
Abdullah Karimi ◽  
Razi Nalim
Keyword(s):  
Gas Turbine ◽  
Pressure Ratio ◽  
Turbulent Flame ◽  
Pressure Rise ◽  
Gas Turbine Engine ◽  
Operating Conditions ◽  
Specific Power ◽  
Inlet Temperature ◽  
Wave Rotor ◽  
Turbine Engine

A wave-rotor pressure-gain combustor (WRPGC) ideally provides constant-volume combustion and enables a gas turbine engine to operate on the Humphrey-Atkinson cycle. It exploits pressure (both compression and expansion) waves and confined propagating combustion to achieve pressure rise inside the combustor. This study first presents thermodynamic cycle analysis to illustrate the improvements of a gas turbine engine possible with a wave rotor combustor. Thereafter, non-steady reacting simulations are used to examine features and characteristics of a combustor rig that reproduces key features of a WRPGC. In the thermodynamic analysis, performance parameters such as thermal efficiency and specific power are estimated for different operating conditions (compressor pressure ratio and turbine inlet temperature). The performance of the WRPGC is compared with the conventional unrecuperated and recuperated engines that operates on the Brayton cycle. Fuel consumption may be reduced substantially with WRPGC introduction, while concomitantly boosting power. Simulations have been performed of the ignition of propane by a hot gas jet and subsequent turbulent flame propagation and shock-flame interaction.

scholarly journals Assessment of a Wave Rotor Topped Demonstrator Gas Turbine Engine Concept

1996 ◽  
Author(s):  
Philip H. Snyder ◽  
Raymond E. Fish
Keyword(s):  
Gas Turbine ◽  
Engine Performance ◽  
Gas Turbine Engine ◽  
Wave Rotor ◽  
Turbine Engine ◽  
Design Point ◽  
Engine Design ◽  
Engine Concept ◽  
Engine Cycle

A wave rotor topped gas turbine engine has been identified which incorporates five basic requirements of a successful demonstrator engine. Predicted performance maps of the wave rotor cycle have been used along with maps of existing gas turbine hardware in a design point study. The effects of wave rotor topping on the engine cycle and the subsequent need to rematch compressor and turbine sections in the topped engine are addressed. Comparison of performance of the resulting engine is made on the basis of wave rotor topped engine versus an appropriate baseline engine using common shaft compressor hardware. The topped engine design clearly demonstrates an improvement in shaft horsepower and SFC. Predicted off design part power engine performance for the wave rotor topped engine is presented including that at engine idle conditions. Operation of the engine at off design is closely examined with wave rotor operation at less than design burner outlet temperatures and rotor speeds. Challenges remaining in the development of a demonstrator engine are addressed.

Flexible manufacturing in repair of gas turbine engine components

1992 ◽  
Author(s):  
KIRK D ◽  
ANDREW VAVRECK ◽  
ERIC LITTLE ◽  
LESLIE JOHNSON ◽  
BRETT SAYLOR
Keyword(s):  
Gas Turbine ◽  
Flexible Manufacturing ◽  
Gas Turbine Engine ◽  
Turbine Engine ◽  
Engine Components

Fracture of a Compressor Stator Blade in a Gas Turbine Engine

2013 ◽  
Vol 50 (1) ◽  
pp. 43-49
Author(s):  
A. Neidel ◽  
B. Matijasevic-Lux
Keyword(s):  
Gas Turbine ◽  
Gas Turbine Engine ◽  
Turbine Engine ◽  
Stator Blade
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