Steady and Unsteady Shock Waves—Expansion Waves Energy Converters
A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "F3: Power Electronics".
Deadline for manuscript submissions: 20 June 2025 | Viewed by 5164
Special Issue Editor
Interests: fluid mechanics; gas dynamics; numerical simulations; fluid mechanics; unsteady flows; car aerodynamics; aerodynamics of animals; CFD; computational fluid dynamics
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Special Issue Information
Dear Colleagues,
The compression and expansion processes of compressible media are the basis of operation of many devices such as heat engines, refrigerators, heat pumps, compressor–expanders in chemical plants, and chemical reactors. Classical compression systems based on multi-stage axial compressors are extremely complex, expensive, and of considerable size. Compressors based on the use of stationary or moving shock waves are simple in design, have small dimensions, and are not as expensive.
Attempts at their practical use have been ongoing for years. Solutions based on transient processes have been realised in devices such as the Comprex and Hyprex compressors, directly in prototypes of heat engines, and gas compression and expansion components in refrigeration and chemical plants. Shock waves generated on rotating compressor and engine components have been used in experimental heat engines and with great success in chemical plants. Comprex-type wave compressors may make a comeback in electric cars with range extenders using environmentally clean synthetic fuels, increasing the efficiency and power of specialised engines used only periodically to charge the car's battery.
An equally interesting area of use for moving shock waves are applications of moving detonation waves that occur when shock waves move through a zone containing a combustible mixture. Applications of pulsating or rotating detonation waves are found in rocket engines or flow engine combustion chambers.
Developments in 3D printing technology may contribute to the wider use of abnormal compression using both stationary and moving shock waves.
This Special Issue aims to bring together and provide a broad presentation of the latest developments in this very extensive but quite specialized area of knowledge.
Prof. Dr. Janusz Piechna
Guest Editor
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Keywords
- SWCRE—shock wave compression rotary engine
- RDE—rotating detonation engines
- Ramjet—supersonic flow engines with air shock wave compression
- PWR—pressure wave refrigerator
- RWE—radial wave engine
- WHP—wave heat pump
- PWE—pressure wave exchangers
- WR—wave rotors
- GWR—gas wave refrigerator (GWR)
- RDC—rotating detonation chamber
- OWDE—hypersonic oblique wave detonation engine
- SWE—shock wave engine
- PC—pulse combustors
- DWC—detonation-wave combustors
- SWR—shock wave reformer
- SWH—shock wave heater
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