A Review of Wave Rotor Technology and Its Applications

Akbari, Pezhman; Nalim, Razi; Müller, Norbert

doi:10.1115/imece2004-60082

Cited by 21 publications

(23 citation statements)

References 115 publications

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“…Under the same inlet conditions of a combustor, the pressure gain combustion is theoretically much more efficient than a conventional Brayton cycle, as shown in Figure 1. Because a lower entropy generation in the combustion process is achieved to improve higher work availability, the output power would be increased and the thermal efficiency of gas turbine engine may be increased by 30%-50% [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Pressure Rise and Flame Acceleration Characteristics in a Single Channel of Wave Rotor Combustor with Spoilers

Zhang

Wei³

et al. 2019

International Journal of Aerospace Engineering

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A simplified single channel wave rotor combustor (WRC) experimental rig was established, in which the spoilers with different blockage ratios (BR) could be conveniently installed and disassembled. The spoilers were firstly used for WRC to improve the pressure rise. The effects of different blockage ratios on the pressure rise and flame acceleration characteristics in a single channel of the WRC were investigated. The addition of spoilers could remarkably improve the pressure rise and flame propagation speed in a single channel of the WRC. While the blockage ratio of the spoiler increases, both pressure rise and mean flame propagation speed are improved. When the spoilers with a blockage ratio of 38.91% are used, the peak pressure increases by 200% compared to that of WRC without the spoilers. When the spoilers of different blockage ratios (23.35%, 31.13%, and 38.91%) are used, it is found that the flame propagation speed is significantly improved with the increasing of the blockage ratio. Specifically, the maximum flame propagation speed reaches 55 m/s, and the maximum mean flame propagation speed is 36.95 m/s. Furthermore, combustion becomes more intense, and the flame is brighter around the spoiler.

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Section: Introductionmentioning

confidence: 99%

Investigation of Pressure Rise and Flame Acceleration Characteristics in a Single Channel of Wave Rotor Combustor with Spoilers

Zhang

Wei³

et al. 2019

International Journal of Aerospace Engineering

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“…The low overall pressure ratio restricted its application and the research work was not continued. However, the pressure-exchange wave rotor, whieh is similar to the pressure-exchange ejeetor, has been widely studied and a great amount of results have been obtained, which are very valuable for pressure-exchange ejector investigation [5,[11][12][13][14][15]. In recent years, the rapid increase of natural gas demand makes the pressureexchange ejector a hot topic due to its high efficieney [16].…”

Section: Introductionmentioning

confidence: 99%

“…In the pressure-exchange ejector, the energy is transferred by the compression or expansion waves [2^]. Therefore, high efficiency and excellent performance could be expected [5].…”

Section: Introductionmentioning

confidence: 99%

The Port Width and Position Determination for Pressure-Exchange Ejector

Zhao

Liu

et al. 2012

Journal of Engineering for Gas Turbines and Power

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A pressure-exchange ejector transferring energy by compression and expansion waves has the potential for higher efficiency. The width and position of each port are essential in pressureexchange ejector design. A dimensionless time x expressing both port widths and the positions of port ends was introduced. A prototype was designed and the experimental system was set up. Many sets of experiment with different geometrical arrangements were conducted. The results suggest that the efficiency greatly changes with the geometrical arrangements. The efficiency is about 60% at proper port widths and positions, while at improper geometrical arrangements, the efficiency is much lower and the maximum deviation may reach about 20%. The proper dimensionless port widths and positions at different operating conditions are obtained. Eor a flxed overall pressure ratio, the widths of the high pressure flow iniet and middle pressure flow outlet increase as the outlet pressure increases and the low pressure flow inlet width is reduced with a larger outlet pressure. The middle pressure flow outlet (MO) opening end remains constant at different outlet pressures. The positions of the high pressure flow inlet (HI) closed end and the low pressure flow inlet (LI) open end increase with the elevation of outlet pressure, however, the distance between the HI closing end and the Ll opening end is constant. The port widths and positions have a signiflcant influence on the performance of the pressure-exchange ejector. The dimensionless data obtained are veiy valuable for pressure-exchange ejector design and performance optimization.

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“…The major principle underlying the operation of wave rotors is based on the physical fact that when two fluids with different thermodynamic properties are brought into direct contact for a very short time, pressure equalizations occurs faster than mixing [1]. This novel technology has been used in various applications that include the use as a supercharging device for IC engines , a topping component for gas turbines [29][30][31][32][33][34], and in refrigeration cycles [35][36][37][38], and more [39].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Unsteady-Flow Processes in Wave Rotors

et al. 2004

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The wave rotor (pressure exchanger) is a device working based on a relatively simple idea of operation, but is challenging in its technical realization and difficult to simulate numerically. It has been common practice to create and use specialized codes for simulating the wave rotor operation. The current work presents an attempt of developing 2D and 3D models of radial and axial wave rotors using the commercial software package FLUENT. In this study geometrical models are used for the device casing and rotor cells. The application of carefully chosen initial and boundary conditions enabled the realization of relative motion of the rotor model. The vast information about the unsteady processes occurring during simulation are visualized. It occurs that such type of models are useful for the final test of devices, after the geometry was optimized by the use of specialized but much simpler 1D codes.

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A Review of Wave Rotor Technology and Its Applications

Cited by 21 publications

References 115 publications

Investigation of Pressure Rise and Flame Acceleration Characteristics in a Single Channel of Wave Rotor Combustor with Spoilers

Investigation of Pressure Rise and Flame Acceleration Characteristics in a Single Channel of Wave Rotor Combustor with Spoilers

The Port Width and Position Determination for Pressure-Exchange Ejector

Numerical Simulation of Unsteady-Flow Processes in Wave Rotors

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