Aerodynamic Effect of Wing Mirror Usage on the Solaris 7 Solar Car and Demobil 09 Electric Vehicle

2020 ◽  
Vol 17 (2) ◽  
pp. 7868-7881
Author(s):  
T. Batuhan Korkut ◽  
Aytac Goren
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Polymer Composites ◽  
Electric Vehicle ◽  
Project Team ◽  
Aerodynamic Effect ◽  
Aerodynamic Performances ◽  
Computational Fluid Dynamics Cfd ◽  
Solar Powered ◽  
Optimisation Technique

This study focuses on the aerodynamic performances of two vehicles by Dokuz Eylul University Solaris Solar Car Project Team. The first vehicle (S7) is a solar-powered vehicle that is designed for World Solar Challenge and the second (D9) is an electric vehicle which is designed for Tubitak EV Challenge. Both vehicles are manufactured using polymer composites and challenged in mentioned races. In this research, a formal optimisation technique based on computational fluid dynamics (CFD) is used to determine the efficient aerodynamic structures under various scenarios. Results clearly show that strategists of the racing teams should take intoaccount the aerodynamic structure of the racing car. Especially before the races which based on efficiency, the apex line is determined, and mirrors should be replaced by back view camera.

scholarly journals EFFECT OF HULL AND ACCOMMODATION SHAPE ON AERODYNAMIC PERFORMANCES OF A SMALL SHIP

2019 ◽  
Vol 18 (4) ◽  
pp. 413-421
Author(s):  
Ninh Cong Toan ◽  
Ngo Van He
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Aerodynamic Performance ◽  
Marine Transportation ◽  
Air Resistance ◽  
Aerodynamic Performances ◽  
Computational Fluid Dynamics Cfd ◽  
Different Shapes ◽  
Small Ship ◽  
Hull Forms

In marine transportation, aerodynamic performance is important for the ships, especially for the small passenger fast ships. It has affected the service speed, air resistance acting on hull, power energy as well as roll, pitch, yaw and stability of the ships. Moreover, the aerodynamic performance also directly affects the passengers, captains or employments who work on the ships. For a bad aerodynamic performance hull shape, it may make an accident in marine transportation. In this paper, the authors present a study on effect of hull shape on aerodynamic performance of a small passenger fast ship by using a commercial Computational Fluid Dynamics (CFD). Several hull forms with different shapes are proposed and computed to show their aerodynamic performances. From the comparison between different CFD results of the ships, the effects of hull shape on aerodynamic performances of the ships  are understood.

Influence Mechanisms of Manufacture Variations on Supersonic/Transonic Blade Aerodynamic Performances

2020 ◽  
Author(s):  
Baojie Liu ◽  
Jiaxin Liu ◽  
Xianjun Yu ◽  
Dejun Meng ◽  
Wenbin Shi
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
High Pressure ◽  
Statistical Analysis ◽  
Mach Number ◽  
Systematic Errors ◽  
Aerodynamic Performance ◽  
Aerodynamic Performances ◽  
Computational Fluid Dynamics Cfd ◽  
Cfd Method

Abstract The results of previous studies have proved that manufacture variations can cause a noticeable influence on compressor aerodynamic performance. The main objective of this paper is to investigate the influence rules and mechanisms of manufacture variations on supersonic/transonic blades aerodynamic performance. The variations used in this study were measured from some newly manufactured high-pressure compressors. In the present study, several blade sections with different design Mach number conditions are selected for further statistical analysis of measured deviation data. Therefore, some systematic errors in the deviation data have been revealed. Based on these data, the computational fluid dynamics (CFD) method has been used to obtain the aerodynamic performances of a large number of the measured blade elements. And then, the analysis of the influence rules of manufacture variations on blade aerodynamic performance in different Mach number conditions has been carried out. The present results indicate that the effects of manufacture variations on blade aerodynamic performance in the lower Mach number (0.8) condition are much more significant comparing to that in the higher Mach number (0.9∼1.2) conditions. Based on this, influence mechanisms of manufacture variations on positive incidence range and negative incidence range have been analyzed. The differences of influence mechanisms in different Mach number conditions are the focus of research.

scholarly journals CFD investigation of interaction effect between hull and accommodation on wind drag of a container ship in head wind

2021 ◽  
Vol 21 (1) ◽  
pp. 37-46
Author(s):  
He Ngo Van ◽  
Thuan Truong Van
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Interaction Effect ◽  
Reference Model ◽  
Interaction Effects ◽  
Aerodynamic Performance ◽  
Container Ship ◽  
Total Resistance ◽  
Aerodynamic Performances ◽  
Computational Fluid Dynamics Cfd

In this paper, we present a research on applying a commercial Computational Fluid Dynamics (CFD) code to determine interaction effect between hull and accommodation on wind drag of a container ship. For the high superstructure and large windward area ships such as container, wind drag acting on hull accounts for a large amount of total resistance. To clearly find aerodynamic performance and interaction effects on wind drag of a container ship, a full scale 1,200 TEU container has been used as a reference model. From results of comparison in the two computed cases of hull with and without accommodation, the interaction effects between hull and accommodation on aerodynamic performance and wind drag have been investigated. The targets of the paper has proposed a new solution to improve aerodynamic performances and reduce wind drag acting on the ship by reducing interaction effects between hull and accommodation.

scholarly journals Aerodynamic Effect of Wheel Fairings on the Wake of a Formula One Car

2021 ◽  
Vol 347 ◽  
pp. 00008
Author(s):  
Liam Davkin ◽  
Craig Law
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Aerodynamic Design ◽  
Low Speed ◽  
Formula One ◽  
Design Changes ◽  
Aerodynamic Effect ◽  
Computational Fluid Dynamics Cfd ◽  
To Come

The open-wheeled configuration of Formula One cars has been known to create unfavourable aerodynamic conditions for overtaking during races. New aerodynamics regulations are set to come into effect by the 2022 season. Early concepts suggested that covering the wheels of a car are amongst the aerodynamic design changes to be implemented. This is in contrast to the traditional open-wheeled configuration. This study aims to evaluate the effect that these fairings have on the behaviour of the wake behind the car. This has been achieved through computational fluid dynamics (CFD) studies which surveyed the flow in the wake, that determined any changes that are added by these fairings. The fairings were found to have altered the structure of the wake, by changing the size of the regions of low-speed airflow at different positions behind the car.

scholarly journals Interaction Effect between Hull and Accommodation on Wind Drag Acting on a Container Ship

2020 ◽  
Vol 8 (11) ◽  
pp. 930
Author(s):  
Ngo Van He ◽  
Ngo Van Hien ◽  
Van-Thuan Truong ◽  
Ngoc-Tam Bui
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Interaction Effect ◽  
Full Scale ◽  
Ship Hull ◽  
Container Ship ◽  
Drastic Reduction ◽  
Aerodynamic Performances ◽  
Computational Fluid Dynamics Cfd

In this paper, we present our research on applying the commercial Computational Fluid Dynamics (CFD) code to investigate interaction effect between hull and accommodation on wind drag acting above the water hull surface of a full scale 1200 TEU container ship. With this purpose, aerodynamic performances and wind drag acting on the ship hull with and without accommodations have been computed. Analyzing the obtained CFD results, the interaction effect between hull and accommodation on aerodynamic performances and wind drag acting on the ship have been found. Various new accommodation shapes have been proposed for the original ship to reduce the interaction effect on wind drag. A drastic reduction in the interaction effect between hull and accommodation on wind drag acting on the ship has been achieved and the obtained results have been shown in this paper.

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