Measurement and Prediction of Heat Transfer Losses on the XMv3 Rotary Engine

Costa, Tiago; Nickerson, Mark; Littera, Daniele; Martins, Jorge; Shkolnik, Alexander; Shkolnik, Nikolay

doi:10.4271/2016-32-0033

Cited by 24 publications

(4 citation statements)

References 15 publications

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“…15). To estimate a ratio between rotor and stationary parts that allows estimation of rotor and total heat losses, a CONVERGE CFD model was developed, and used together with GT-POWER 97 . Results indicate higher heat losses for the "X" geometry than seen in the experimental Wankel data because the engine is still under development and sensitive to seal condition and coatings used.…”

Section: Current Designs Of Rotary Conceptsmentioning

confidence: 99%

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Combustion Chamber Design Effect on The Rotary Engine Performance - A Review

Boughou

Mohiuddin

2020

IJAE

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Comparatively, this review is meant to focus on possible developments studies of the rotary engine design. The controversial engine produces a direct rotational motion. Felix Wankel derived the triangular rotor shape from complex geometry of the Reuleaux triangle. The Wankel engine simulation and prediction of its performance is still limited. The current work reviews rotary engine's flow field inside the combustion chamber with different commercial software used. It studies different parameters effect on the performance of the engine, such as the effect of the recess sizes and the shape-factor. It is found that the engine chambers design is one of the aspects of improvement opportunities.

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Section: Current Designs Of Rotary Conceptsmentioning

confidence: 99%

“…16) and SARM for drones and range extenders. LiquidPiston: a rotary engine, fourstroke of "X" architecture with intake and exhaust through rotor shaft [95][96][97][98] . The LiquidPiston's "X" architecture is a rotary engine that similar in some aspects to the Wankel.…”

Section: Fig 15 Small Rotary Engine Finite Model and Stress Distribmentioning

confidence: 99%

Combustion Chamber Design Effect on The Rotary Engine Performance - A Review

Boughou

Mohiuddin

2020

IJAE

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“…In the standard k-epsilon model, the eddy viscosity is determined from a single turbulence length scale, so the calculated turbulent diffusion is that which occurs only at the specified scale, whereas in reality all scales of motion will contribute to the turbulent diffusion. The RNG approach, which is a mathematical technique that can be used to derive a turbulence model similar to the k-epsilon, results in a modified form of the epsilon equation which attempts to account for the different scales of motion through changes to the production term [12][13][14][15].…”

Section: Modelling Approachmentioning

confidence: 99%

Numerical study using detailed chemistry combustion comparing effects of wall heat transfer models for compression ignition diesel engine

et al. 2019

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The present work highlights the effect of wall heat transfer models on numerical predictions of combustion phenomenon in compression ignition diesel engine. A comparison of engine's performance is made using O'Rourke and Amsden, Han and Reitz and Angelberger heat transfer models. A detailed chemistry model employed comprises of 61 species and 235 reactions for n-heptane/diesel combustion. RANS RNG k-ε turbulence model (Reynolds-averaged Navier-Stokes: RANS; re-normalisation group: RNG; turbulent kinetic energy-rate of dissipation of turbulence energy: k-ε turbulence model) is used here to model mass, momentum and energy transport equations for engine computational fluid dynamics simulations. The study performed is on turbocharged 130PS 5.675L diesel engine and presented against experimental findings. Effect of different wall treatment models on accuracy and inherent computational time requirement for predicting engine P-θ (cylinder pressure vs. crank angle) curve, indicated mean effective pressure and AHRR (apparent heat release rate) is discussed in this paper. This comparative study facilitates in choosing optimum heat transfer model for in-cylinder combustion study vis-à-vis the trade-offs between solution accuracy (which drives product quality) versus computational time (which drives time to market).

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“…A 70-hp water-cooled diesel engine was initially devised to verify XE operation and basic principles [12], and a 70-cc air-cooled gasoline engine was subsequently applied to a small cart [13]. Recent research has continued to improve durability, heat transfer performance, and sealing performance aimed at developing emergency engines (range-extenders) for generators, small aircraft, and electric vehicles [14,15]. However, the X2 rotary engine, the successor to the first XE, suffered from a large surface area for the fuel-air mixture and a large engine wall, resulting in a large flameout volume, a major disadvantage for rotary engines, and was prone to emitting considerable amounts of unburned gas, constituting a further critical challenge.…”

Section: Introductionmentioning

confidence: 99%

Optimal Design for New Rotary Engine with Geometric Shape Functions on Combustion Chamber and Ports

Kim,

Park,

Yang

et al. 2024

Energies

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This study presents an optimal design for a new rotary engine. Instantaneous shape functions were applied to the combustion chamber, and intake and exhaust ports were derived based on the rotor and housing design functions; then optimized design parameters were derived for a rotary engine. The three main parameters were shape distance, eccentric distance and rotor thickness. The design process for the optimized internal shape was subsequently defined considering target specifications for the rotary engine, and a prototype engine was designed and fabricated with a 336 cm3 intake volume. The compression pressure for the prototype engine was compared with the motoring test and calculated. These outcomes confirmed the new engine’s feasibility, and the derived geometric shape functions will be helpful to ensure optimal design for rotary engines using one- or three-dimensional computational fluid dynamics.

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Measurement and Prediction of Heat Transfer Losses on the XMv3 Rotary Engine

Cited by 24 publications

References 15 publications

Combustion Chamber Design Effect on The Rotary Engine Performance - A Review

Combustion Chamber Design Effect on The Rotary Engine Performance - A Review

Numerical study using detailed chemistry combustion comparing effects of wall heat transfer models for compression ignition diesel engine

Optimal Design for New Rotary Engine with Geometric Shape Functions on Combustion Chamber and Ports

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