Experimental Results of Performance Tests on a Four-Port Wave Rotor

Wilson, James T.; Welch, Gerard E.; Paxson, Daniel E.

doi:10.2514/6.2007-1250

Cited by 25 publications

(19 citation statements)

References 5 publications

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“…Consequently, more work can be produced from the turbine in the cycle topped with the wave rotor, increasing engine thermal efficiency and output power. This outcome has been demonstrated both theoretically [28][29][30] and experimentally [23,31]. However, the complex ducting to and from the combustor and additional weight may be seen as drawbacks to this approach [32,33].…”

Section: A Pressure-exchange Wave Rotor: Basic Machinementioning

confidence: 88%

“…The code's one-dimensional detonation prediction capability later became widely useful for the study of pulse detonation engines [20,65]. NASA's internal focus remained on pressure-exchange wave rotors [23], with particular attention to improvements in design, including sealing technology and ducting [35], while sponsoring university research on wave rotor combustion.…”

Section: Asea Brown Boveri (1989-1994)mentioning

confidence: 99%

“…Today, fast computational tools and fastresponse diagnostics for nonsteady flow and combustion could reveal underlying fundamental physics and potentially shorten development time. New solutions to mechanical design challenges such as clearance control and sealing issues have been developed and are being tested [23,24,86].…”

Section: Challenges and Research Needsmentioning

confidence: 99%

“…With proper timing of the port interactions, these waves effect pressure and energy exchange between fluids, dynamically, that is, without pressure equilibration. To minimize leakage, the gap between the end plates and the rotor has to be uniformly very small, for example, less than a hundredth of the channel height [23], avoiding contact under all operating and thermal expansion conditions. Additional sealing may be used [24].…”

Section: Wave Rotor Approach To Pressure-gain Combustionmentioning

confidence: 99%

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Review of Recent Developments in Wave Rotor Combustion Technology

Akbari

Nalim

2009

Journal of Propulsion and Power

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For some decades, efforts have been made to exploit nonsteady combustion and gas dynamic phenomenon. The theoretical potential of nonsteady-flow machines has led to the investigation of various oscillatory flow devices such as pulse detonation engines, wave rotors, pulse jets, and nonsteady ejectors. This paper aims to provide a progress review of past and current research in developing a particular combustion concept: the wave rotor combustor. This pressure-gain combustor appears to have considerable potential to enhance the performance and operating characteristics of gas turbine and jet engines. After attempts in the mid-twentieth century were thwarted by mechanical problems and technical challenges identified herein, recent successes in Switzerland and efforts in the United States benefited from design expertise developed with pressure-exchange wave rotors. The history, potential benefits, past setbacks, and existing challenges and obstacles in developing these nonsteady combustors are reviewed. This review focuses on recent efforts that seek to improve the performance and costs of future propulsion and powergeneration systems.

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Section: A Pressure-exchange Wave Rotor: Basic Machinementioning

confidence: 88%

Section: Asea Brown Boveri (1989-1994)mentioning

confidence: 99%

Section: Challenges and Research Needsmentioning

confidence: 99%

Section: Wave Rotor Approach To Pressure-gain Combustionmentioning

confidence: 99%

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Review of Recent Developments in Wave Rotor Combustion Technology

Akbari

Nalim

2009

Journal of Propulsion and Power

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“…shown in Fig.JO [ 19], intended to test the feasibility of wave-rotor topping for~ gasturbine performance enhancement [20) using the wave-rotor topping cycle of Fig. 2.…”

Section: Simultaneous Solution Of \Van Solution Andmentioning

confidence: 99%

Leakage Assessment of Pressure-Exchange Wave Rotors

Akbari¹,

Nalim²,

Donovan³

et al. 2006

42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference &Amp;amp; Exhibit

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Control of leakage within waw rotors is recognized as a key requirement for efficient operation. Previous studies suggest that experimentally observed perfonnance degradation is substantially due to flow leakage. This work presents a leakage model for predicting leakage-attributed performance degradation of four-port pressureexchange '":ave roto.rs more accurately than previous single-cavity leakage models. The methodology comprehensively considers the leakage paths of the entire device. It combines a wave-rotor quasi-one-dimensional computational fluid dynamics prediction code, experimentally validated for internal gas dynamics with the generalized How-circuit-modeling capability of a leakage-How network solver. The computational fluid dynamics program and the network solver step through a series of iterations by sharing common leakage information. ~pplication to a well-instrumented wave-rotor rig is brieHy summarized, providing important guidance for the Irnpro~ement of le~kage and performance. The new approach is anticipated to be useful in enhancing the design, operation, and efficiency of a broad class of wave rotors by better understanding leakage and hence designing sealing features to control leakage Hows.

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Mass-based design and optimization of wave rotors for gas turbine engine enhancement

Chan

Liu

2016

Shock Waves

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Experimental Results of Performance Tests on a Four-Port Wave Rotor

Cited by 25 publications

References 5 publications

Review of Recent Developments in Wave Rotor Combustion Technology

Review of Recent Developments in Wave Rotor Combustion Technology

Leakage Assessment of Pressure-Exchange Wave Rotors

Mass-based design and optimization of wave rotors for gas turbine engine enhancement

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