Comparison of flow field and combustion in single and double side ported rotary engine

Taşkıran, Özgür Oğuz; Calik, Alper Tolga; Kutlar, Osman Akın

doi:10.1016/j.fuel.2019.115651

Cited by 60 publications

(13 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…35 Precisely because of the above reason, RNG k − ε turbulence model has been widely considered to be able to meet the needs of flow field calculation of rotary engine. 7,10,25,28 Engine technical specifications.…”

Section: Boundary Conditions Turbulence Model Selection and Modelmentioning

confidence: 99%

“…This is mainly because the RNG k − ε turbulence model can consider the streamline bending, swirl, rotation, and fast changing tension effects 35 . Precisely because of the above reason, RNG k − ε turbulence model has been widely considered to be able to meet the needs of flow field calculation of rotary engine 7,10,25,28 . In addition, in order to further verify the rationality of choosing RNG k − ε turbulence model, based on an optical side ported rotary engine test‐bed established in our previous work, 25 the flow field on the RHCP was tested by PIV.…”

Section: Mathematical Models and Model Validationmentioning

confidence: 99%

“…This unidirectional flow moves from the back to the front of the CC, which makes it is not easy for the flame to propagate against the direction of the unidirectional flow to the back of the CC 9 . Therefore, to solve the problem of the slow flame propagation velocity of the mixture at the back of the CC, it is necessary to make an in‐depth investigation on the flow field, the distribution of the mixture and the flame propagation process in the CC 10 . Among them, the study of flow field is the basis of studying mixture formation and flame propagation 11 .…”

Section: Introductionmentioning

confidence: 99%

“…9 Therefore, to solve the problem of the slow flame propagation velocity of the mixture at the back of the CC, it is necessary to make an in-depth investigation on the flow field, the distribution of the mixture and the flame propagation process in the CC. 10 Among them, the study of flow field is the basis of studying mixture formation and flame propagation. 11 This is because the mixture formation, 12 flame propagation, 13 and emission formation 14 are affected by the flow field.…”

mentioning

confidence: 99%

See 3 more Smart Citations

The formation mechanisms of flow field in a compound intake ported rotary engine considering apex seal leakage

Fan

Zhang

Pan

et al. 2020

Env Prog and Sustain Energy

View full text Add to dashboard Cite

The development of rotary engines is severely restricted by its low combustion efficiency and high emission. In-cylinder flow field is known to play a major role in combustion process for rotary engines. Therefore, in the present article, a threedimensional dynamic simulation model considering leakage through apex seals was developed and verified by the two-dimensional particle image velocimetry experiment results on the rotor housing central plane. Based on the three-dimensional dynamic simulation model, the formation mechanisms of flow field in a compound intake ported rotary engine under different apex seal leakage gap sizes (0.02, 0.04, 0.06, and 0.08 mms) and engine speeds (2,000, 3,500, and 5,000 rpms) were numerically studied. The simulation results showed that there exist two formation mechanisms of the flow field in the intake stroke, that is, "side intake port dominance" and "peripheral intake port dominance." For the three engine speeds (2,000, 3,500, and 5,000 rpms), with the increase of apex seal leakage gap size, the formation mechanism of the flow field gradually changed from "side intake port dominance" to "peripheral intake port dominance." In addition, the influences of apex seal leakage on the volume coefficient and the turbulence kinetic energy in the combustion chamber were also investigated in detail. K E Y W O R D S apex seal leakage, compound intake port, flow field, rotary engine 1 | INTRODUCTION With the increasingly serious energy crisis and environmental problems, it is urgent to develop new types of engines that have higher efficiency and lower pollution. 1,2 As a new type of engine, with simple structure and high power-to-weight ratio, rotary engines have been widely used in many fields, such as aircraft, cars and motorcycles for many years. 3 In particular, the rapid development of small unmanned aerial vehicles (SUAVs) and range extended electric vehicles (REEVs) in recent years has provided new opportunities for rotary engines. This is mainly because SUAVs and REEVs need a small size and high power-to-weight power device, and rotary engines can well meet the above requirements. 4 For example, a range extender with a rotary engine designed by AVL List GmbH is regarded as one of the most promising power generation mode for REEVs. 5 Because of the above promising application prospects, the investigation, and development of rotary engines have attracted more and more attention from many countries and research institutions. 6

show abstract

Section: Boundary Conditions Turbulence Model Selection and Modelmentioning

confidence: 99%

Section: Mathematical Models and Model Validationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

The formation mechanisms of flow field in a compound intake ported rotary engine considering apex seal leakage

Fan

Zhang

Pan

et al. 2020

Env Prog and Sustain Energy

View full text Add to dashboard Cite

show abstract

“…In this research, a single-zone thermodynamic model is developed for studying the performance characteristics of a two-stroke gasoline Wankel engine [22,23]. The thermodynamic model results will decrease the necessary time and effort for the CFD model and experimental studies [24,25]. According to the absence of academic research on the two-stroke Wankel engine, model parameters are taken from the four-stroke Wankel and two-stroke cross scavenging reciprocating engines and adapted to the new geometry.…”

Section: Introductionmentioning

confidence: 99%

Two-Stroke Wankel Type Rotary Engine: A New Approach for Higher Power Density

Kutlar

Malkaz

2019

Energies

View full text Add to dashboard Cite

The Wankel engine is a rotary type of four-stroke cycle internal combustion engine. The higher specific power output is one of its strong advantages. In Wankel rotary engine, every eccentric shaft revolution corresponds to one four-stroke cycle, whereas conventional reciprocating engine fulfills four-stroke cycle in two crankshaft revolutions. This means the power stroke frequency is twice that of conventional engines. Theoretically, application of two-stroke cycle on Wankel geometry will duplicate the power stroke frequency. In this research, a single-zone thermodynamic model is developed for studying the performance characteristic of a two-stroke Wankel engine. Two different port timings were adapted from the literature. The results revealed that late opening and early closing port geometry (small opening area) with high supercharging pressure has higher performance at low speed range. However, as the rotor speed increases, the open period of the port area becomes insufficient for the gas exchange, which reduces power performance. Early opening and late closing port geometry (large opening area) with supercharging is more suitable in higher speed range. Port timing and area, charging pressure, and speed are the main factors that characterize output performance. These preliminary results show a potential for increasing power density by applying two-stroke cycle of the Wankel engine.

show abstract

Experimental Investigation on the Effect of Blending Ethanol on Combustion Characteristic and Idle Performance in a Gasoline Rotary Engine

et al. 2021

View full text Add to dashboard Cite

Comparison of flow field and combustion in single and double side ported rotary engine

Cited by 60 publications

References 12 publications

The formation mechanisms of flow field in a compound intake ported rotary engine considering apex seal leakage

The formation mechanisms of flow field in a compound intake ported rotary engine considering apex seal leakage

Two-Stroke Wankel Type Rotary Engine: A New Approach for Higher Power Density

Experimental Investigation on the Effect of Blending Ethanol on Combustion Characteristic and Idle Performance in a Gasoline Rotary Engine

Contact Info

Product

Resources

About