World Journal of Engineering Research and Technology (WJERT) has indexed with various reputed international bodies like : Google Scholar , Index Copernicus , Indian Science Publications , SOCOLAR, China , International Institute of Organized Research (I2OR) , Cosmos Impact Factor , Research Bible, Fuchu, Tokyo. JAPAN , Scientific Indexing Services (SIS) , Jour Informatics (Under Process) , UDLedge Science Citation Index , International Impact Factor Services , International Scientific Indexing, UAE , International Society for Research Activity (ISRA) Journal Impact Factor (JIF) , International Innovative Journal Impact Factor (IIJIF) , Science Library Index, Dubai, United Arab Emirates , Scientific Journal Impact Factor (SJIF) , Science Library Index, Dubai, United Arab Emirates , Eurasian Scientific Journal Index (ESJI) , Global Impact Factor (0.342) , IFSIJ Measure of Journal Quality , Web of Science Group (Under Process) , Directory of Research Journals Indexing , 

World Journal of Engineering Research and Technology

An ISO 9001:2015 Certified International Journal.

An International Peer Reviewed Journal for Engineering Research and Technology

ISSN 2454-695X

Impact Factor : 5.924

ICV : 79.45

News & Updation

  • Article Invited for Publication

    Article are invited for publication in WJERT Coming Issue

  • ICV

    WJERT Rank with Index Copernicus Value 79.45 due to high reputation at International Level

  • New Issue Published

    Its Our pleasure to inform you that, WJERT 1 September 2020 Issue has been Published, Kindly check it on http://wjert.org/home/current_issues

  • WJERT New Impact Factor

    Its our Pleasure to Inform you that WJERT Impact Factor has been increased from  5.549 to 5.924 due to high quality Publication at International Level

  • WJERT SEPTEMBER ISSUE PUBLISHED

    SEPTEMBER 2020 Issue has been successfully launched on 1 September 2020.

Indexing

Abstract

INVESTIGATION OF DRAG & LIFT FORCES FOR A HOLLOW PROJECTILE AND ITS NUMERICAL VALIDATION

MD Rafiqur Rahman*

ABSTRACT

Accurate experimental methods for determining the drag and lift forces of the projectile is very important. The trajectory of a projectile through the air is affected both by gravity and by aerodynamic forces. The aerodynamic forces can conveniently be ignored in many situations, even when they are comparatively large. In this paper 37 mm hollow projectile is considered since it shows good performance characteristics and easy to handle. Here main emphasis was given to determine pressure coefficient, Drag coefficients, lift coefficient of the hollow projectiles at different angle of attack. To study the aerodynamic characteristics of the projectiles the experiment was conducted in an open circuit subsonic wind tunnel where uniform flow velocity is maintained across the flow direction. For the experiment varied angles of the attack mostly between 30° to 50° is considered with an interval of 5°. Here inclined manometer was used to find out the surface static pressure and then the pressure coefficient was determined from that. Finally, for the numerical scheme, the ANSYS Software was used to simulate the experiment. In this study, it was found that the drag and lift forces acting on the projectiles, both increases when the angle of attack increases.

[Full Text Article]