Experimental and computational fluid dynamics-based numerical simulation of using natural gas in a dual-fueled diesel engine

Akbarian, Eivaz; Najafi, Bahman; Jafari, Mohsen A.; Ardabili, Sina Faizollahzadeh; Shamshirband, Shahaboddin; Chau, Kwok-wing

doi:10.1080/19942060.2018.1472670

Cited by 118 publications

(93 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent decades, rapid improvements in the computational power have made computational fluid dynamics be a useful tool for real-life case studies (Akbarian et al, 2018;Ardabili et al, 2018;Mou, He, Zhao, & Chau, 2017). Due to the complex structure of the pump, it is difficult to observe the flow field inside the pump experimentally.…”

Section: Comparison Of Different Cylinder Ports For the Eha Pumpmentioning

confidence: 99%

Effects of inclined cylinder ports on gaseous cavitation of high-speed electro-hydrostatic actuator pumps: a numerical study

Chao

Zhang

et al. 2019

Engineering Applications of Computational Fluid Mechanics

View full text Add to dashboard Cite

Raising the rotational speed of electro-hydrostatic actuator (EHA) pumps is a useful way to improve their power density. However, gaseous cavitation tends to occur in the displacement chambers at high speed, reducing the effective delivery flow rate of EHA pumps. It is a common approach to reduce the gaseous cavitation by increasing the inlet pressure. However, this conventional approach requires additional devices to boost the inlet line, which decreases the EHA pump's power density. The contribution of this study is to reduce the gaseous cavitation by introducing inclined cylinder block ports for EHA pumps, which only modifies the cylinder ports and needs no additional devices. A computational fluid dynamics (CFD) model was developed to investigate the effects of the inclined direction of cylinder ports on the gaseous cavitation. The simulation results showed that the inwardinclined design of cylinder ports could effectively decrease the gaseous cavitation using centrifugal effects of rotating fluid. Compared with a standard cylinder block, the cylinder block with inwardinclined ports could increase the effective delivery flow rate by 4% at an inlet pressure of 1 MPa and a rotational speed of 20,000 r/min. ARTICLE HISTORY

show abstract

Section: Comparison Of Different Cylinder Ports For the Eha Pumpmentioning

confidence: 99%

Effects of inclined cylinder ports on gaseous cavitation of high-speed electro-hydrostatic actuator pumps: a numerical study

Chao

Zhang

et al. 2019

Engineering Applications of Computational Fluid Mechanics

View full text Add to dashboard Cite

show abstract

“…With the development of numerical analysis technology, numerical simulation has received a much wider application in analyzing the flow field structure (Akbarian et al, 2018;Ghalandari, Mirzadeh Koohshahi, Mohamadian, Shamshirband, & Chau, 2019;Ramezanizadeh, Alhuyi Nazari, Ahmadi, & Chau, 2019). The three-dimensional flexible fish-like model has been employed in numerical simulation to study the hydrodynamic characteristics of a fish's motion (Leroyer & Visonneau, 2005).…”

Section: Introductionmentioning

confidence: 99%

Evolvement rule and hydrodynamic effect of fluid field around fish-like model from starting to cruising

Xue

Liu

et al. 2020

Engineering Applications of Computational Fluid Mechanics

View full text Add to dashboard Cite

Underwater vehicles are widely used in underwater detection, and bionic design, e.g. imitating fish, is an important way to improve their hydrodynamic performance. Most research is on the mechanical structure and kinematics of fish-like models, while evolvement rules and hydrodynamic effects of fluid field around fish have not been studied adequately. In this paper, a kinematic model to simulate the swimming motion of fish is established according to the actual movement of tuna, and the model is optimized to achieve convenient adjustment in the initial oscillating position and maximum oscillating amplitude. A numerical simulation model is established and the boundary condition is verified by experiments with a physical fish-like prototype and a set of force measuring devices. The evolvement rule of the fluid field around the fish-like model from starting to cruising is determined and the hydrodynamic effect is analyzed. The issue of the effect of fluid fields with various averaged fish-like model densities in the buoyancy regulating process is discussed. Finally, a novel way to calculate the Strouhal number is proposed. The results show that the averaged drag force coefficient decreases as the fish-like model speeds up, because the water pressure near the fish head strengthens to generate a larger resistance force and the vortex in the wake field disperses to produce a less positive effect. The viewpoint that the superposition of vortices will benefit the fish-like model instead of weakening the positive effect is confirmed. The width value of the reversed Kármán vortex street can be connected with the Strouhal number, and the Strouhal number can be calculated by the evolvement rule of the fluid field. This research will contribute to bionic autonomous underwater vehicle design. ARTICLE HISTORY

show abstract

“…They used semi-elliptical corrugations on the outer side of an inner tube of a heat exchanger and this method delayed the separation of flow. Another method to increase the efficiency of using heat exchangers or other instruments is the application of numerical methods (Akbarian et al, 2018;Chau & Jiang, 2004). Numerical simulations make it possible to improve performance and answer the question of which points have design problems.…”

Section: Introductionmentioning

confidence: 99%

A numerical and experimental study on the energy efficiency of a regenerative Heat and Mass Exchanger utilizing the counter-flow Maisotsenko cycle

Abadi

Sadi

Farzaneh–Gord

et al. 2019

Engineering Applications of Computational Fluid Mechanics

Self Cite

View full text Add to dashboard Cite

In this work, a numerical and experimental study is performed to evaluate the affecting variables on energy efficiency of a novel regenerative evaporative cooler utilizing dew-point indirect evaporative cooling. For first time, an investigation is experimentally and numerically carried out to study the effects of the channel number on important parameters such as product temperature and humidity ratio. Investigations are carried out for five configurations with various channel numbers. The comparison of the numerical and experimental results is obtained and well accuracy observed. For the five studied configurations, the results show that with an increase in the number of channels, the outlet temperature decreases. For an inlet air flow rate of 100-600 m 3 /h, the cooled outlet flow temperature changes to the range of 23.4-30. 7°C, 19.7-28.3°C, 18-26.4°C, 17.2-25°C and 16.6-23.8°C. For the configurations with finned channels, the percentage of increase in produced air temperature reaches 11.5% for HMX B, 18.6% for HMX C, 23.4% for HMX D and 26.9% for HMX E, as compared with HMX A. ARTICLE HISTORY

show abstract

Experimental and computational fluid dynamics-based numerical simulation of using natural gas in a dual-fueled diesel engine

Cited by 118 publications

References 39 publications

Effects of inclined cylinder ports on gaseous cavitation of high-speed electro-hydrostatic actuator pumps: a numerical study

Effects of inclined cylinder ports on gaseous cavitation of high-speed electro-hydrostatic actuator pumps: a numerical study

Evolvement rule and hydrodynamic effect of fluid field around fish-like model from starting to cruising

A numerical and experimental study on the energy efficiency of a regenerative Heat and Mass Exchanger utilizing the counter-flow Maisotsenko cycle

Contact Info

Product

Resources

About