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Energies
Volume 13
Issue 9
10.3390/en13092362
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Article

A Design of the Compression Chamber and Optimization of the Sealing of a Novel Rotary Internal Combustion Engine Using CFD

by
Savvas Savvakis
*,
Dimitrios Mertzis
,
Elias Nassiopoulos
and
Zissis Samaras
Department of Mechanical Engineering, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece
*
Author to whom correspondence should be addressed.
Energies 2020, 13(9), 2362; https://doi.org/10.3390/en13092362
Received: 29 March 2020 / Revised: 27 April 2020 / Accepted: 1 May 2020 / Published: 9 May 2020
(This article belongs to the Section Energy Fundamentals and Conversion)
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Abstract

The current paper investigates two particular features of a novel rotary split engine. This internal combustion engine incorporates a number of positive advantages in comparison to conventional reciprocating piston engines. As a split engine, it is characterized by a significant difference between the expansion and compression ratios, the former being higher. The processes are decoupled and take place simultaneously, in different chambers and on the different sides of the rotating pistons. Initially, a brief description of the engine’s structure and operating principle is provided. Next, the configuration of the compression chamber and the sealing system are examined. The numerical study is conducted using CFD simulation models, with the relevant assumptions and boundary conditions. Two parameters of the compression chamber were studied, the intake port design (initial and optimized) and the sealing system size (short and long). The best option was found to be the combination of the optimized intake port design with the short seal, in order to keep the compression chamber as close as possible to the engine shaft. A more detailed study of the sealing system included different labyrinth geometries. It was found that the stepped labyrinth achieves the highest sealing efficiency. View Full-Text
Keywords: SARM; rotary engine; compression chamber; combustion chamber; sealing; CFD SARM; rotary engine; compression chamber; combustion chamber; sealing; CFD
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MDPI and ACS Style

Savvakis, S.; Mertzis, D.; Nassiopoulos, E.; Samaras, Z. A Design of the Compression Chamber and Optimization of the Sealing of a Novel Rotary Internal Combustion Engine Using CFD. Energies 2020, 13, 2362. https://doi.org/10.3390/en13092362

AMA Style

Savvakis S, Mertzis D, Nassiopoulos E, Samaras Z. A Design of the Compression Chamber and Optimization of the Sealing of a Novel Rotary Internal Combustion Engine Using CFD. Energies. 2020; 13(9):2362. https://doi.org/10.3390/en13092362

Chicago/Turabian Style

Savvakis, Savvas; Mertzis, Dimitrios; Nassiopoulos, Elias; Samaras, Zissis. 2020. "A Design of the Compression Chamber and Optimization of the Sealing of a Novel Rotary Internal Combustion Engine Using CFD" Energies 13, no. 9: 2362. https://doi.org/10.3390/en13092362

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