The influence of rotational charge motion intensity on nitric oxide formation in gas-engine cylinder

Кавтарадзе, Р. З.; Onishchenko, D. O.; Zelentsov, Andrei; Sergeev, S. S.

doi:10.1016/j.ijheatmasstransfer.2009.03.060

Cited by 16 publications

(6 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The initial value of turbulent kinetic energy k0 = 5 m 2 /s 2 , and turbulence length scale TLS0 = 0.001 m As a result of the calculation, the values of temperature, pressure, and velocities of the working fluid in the cross-sections of the WE working chamber were obtained both for the processes of exhaust, scavenging, filling of the working chamber (Figure 6a-c), and combustion of the fuel-air mixture (Figure 7a-d). It is worth noting that in traditional piston engines, an increase in the efficiency of the combustion of the air-fuel mixture, as well as a reduction in emissions of harmful substances, can be achieved by profiling the intake ports and the combustion chamber [20][21][22]. In a Wankel engine, the effect of flow swirl at the inlet is less noticeable due to the characteristic shape of the combustion chamber, which, by the time the rotor reaches the TDC (top dead center, the point of the minimum combustion chamber volume), is strongly deformed in the radial direction.…”

Section: Results Of Numerical Experimentsmentioning

confidence: 99%

Improvement of Combustion Process of Spark-Ignited Aviation Wankel Engine

et al. 2019

View full text Add to dashboard Cite

This paper deals with the creation of modern high-performance aircraft power units based on the Wankel rotary piston engine. One of the main problems of Wankel engines is high specific fuel consumption. This paper solves the problem of improving the efficiency of this type of engine. The mathematical model of non-stationary processes of transfer of momentum, energy, mass, and the concentration of reacting substances in the estimated volume provides for the determination of local gas parameters in the entire computational region, which are presented as a sum of averaged and pulsation components. The k-ζ-f model is used as the turbulence model; the combustion is described by the coherent flame model (CFM) based on the concept of laminar flame propagation. As a result of the calculation, we obtained the values of temperature, pressure, and velocity of the working fluid in the working chamber cross-sections of a rotary–piston engine. Various options of the rotor recess shape are considered. Based on the data obtained, the rotor design was improved. The offered shape of the rotor recess has reduced emissions of both nitrogen oxides and carbon dioxide.

show abstract

Section: Results Of Numerical Experimentsmentioning

confidence: 99%

Improvement of Combustion Process of Spark-Ignited Aviation Wankel Engine

et al. 2019

View full text Add to dashboard Cite

show abstract

“…We also emphasize that this mathematical model is typical for CFD calculations of processes in piston engines and it is described in detail by Merker et al [16], Basshuysen and Schäfer [17], Kavtaradze et al [18].…”

Section: Numerical Analysismentioning

confidence: 99%

CFD Modelling of Formula Student Car Intake System

2020

View full text Add to dashboard Cite

Formula Student Car (FS) is an international race car design competition for students at universities of applied sciences and technical universities. The winning team is not the one that produces the fastest racing car, but the group that achieves the highest overall score in design, racing performance. The arrangement of internal components for example, predicting aerodynamics of the air intake system is crucial to optimizing car performance as speed changes. The air intake system consists of an inlet nozzle, throttle, restrictor, air box and cylinder suction pipes (runners). The paper deals with the use of CFD numerical simulations during the design and optimization of components. In this research article, two main steps are illustrated to develop carefully the design of the air box and match it with the suction pipe lengths to optimize torque over the entire range of operating speeds. Also the current intake system was assessed acoustically and simulated by means of 1-D gas dynamics using the software AVL-Boost. In this manner, before a new prototype intake manifold is built, the designer can save a substantial amount of time and resources. The results illustrate the improvement of simulation quality using the new models compared to the previous AVL-Boost models.The results illustrate the improvement of simulation quality using the new models compared to the previous AVL-Boost models.

show abstract

“…We also emphasize that this mathematical model is typical for CFD calculations of processes in piston engines and it is described in detail in Merker et al 2019;Basshuysen and Schäfer 2007;Kavtaradze et al 2009).…”

Section: Mathematical Modelmentioning

confidence: 99%

1D and 3D Modeling of Modern Automotive Exhaust Manifold

Mohamad¹,

Zelentsov²

2019

JSSCM

View full text Add to dashboard Cite

This paper presents the simulation of the multi-cylinder 4-stroke cycle spark-ignition engine using a commercial simulation tool, AVL BOOST and Fire. Various models were examined to select the appropriate models that would best serve to analyze the main components of the exhaust systems: the plenum chamber, the muffler and the exhaust manifold branch junction. For the plenum chamber and the muffler, the whole duct model was tested. In order to analyze the exhaust manifold branch junction, a complicated model which reflects the actual shape and involves pressure drops, velocity magnitude and sound pressure was compared to a simplified one. However, the results from 1D and 3D model calculations compared with Honda K20B Engine experimental data also show that both models are applicable with satisfying accuracy for exhaust manifold branch junction. The simplified 1D model is recommended in regard to convenience in modeling and efficiency in calculation.

show abstract

The influence of rotational charge motion intensity on nitric oxide formation in gas-engine cylinder

Cited by 16 publications

References 6 publications

Improvement of Combustion Process of Spark-Ignited Aviation Wankel Engine

Improvement of Combustion Process of Spark-Ignited Aviation Wankel Engine

CFD Modelling of Formula Student Car Intake System

1D and 3D Modeling of Modern Automotive Exhaust Manifold

Contact Info

Product

Resources

About