Investigation of base pressure variations in internal and external suddenly expanded flows using CFD analysis

The Aerodynamic base drag because of negative pressure at the backward-facing step is a general obstacle connected with all the moving projectiles. The aerodynamic base drag is undesirable since its contribution to the cumulative drag is substantial. The study of pressure variations in the base regi...

Full description

Bibliographic Details
Main Authors:	Pathan, Khizer Ahmed, Dabeer, Prakash S, Khan, Sher Afghan
Format:	Article
Language:	English English
Published:	Penerbit Akademia Baru 2019
Subjects:	TL500 Aeronautics
Online Access:	http://irep.iium.edu.my/71853/ http://irep.iium.edu.my/71853/ http://irep.iium.edu.my/71853/1/CFDLV11_N4_P32_40.pdf http://irep.iium.edu.my/71853/7/71853_Investigation%20of%20base%20pressure%20variations%20_scopus.pdf

id	iium-71853
recordtype	eprints
spelling	iium-718532019-11-24T17:22:16Z http://irep.iium.edu.my/71853/ Investigation of base pressure variations in internal and external suddenly expanded flows using CFD analysis Pathan, Khizer Ahmed Dabeer, Prakash S Khan, Sher Afghan TL500 Aeronautics The Aerodynamic base drag because of negative pressure at the backward-facing step is a general obstacle connected with all the moving projectiles. The aerodynamic base drag is undesirable since its contribution to the cumulative drag is substantial. The study of pressure variations in the base region is of immense help for all moving projectiles. The experimental study of aerodynamic drag over missile/ projectile in a wind tunnel has various disadvantages like a considerable amount of air supply is required to conduct the test, the support mechanism is required to hold the model in the wind tunnel test section which creates disturbance in the flow field and introduce the errors in the measurements. In this research paper, the similarities of base pressure variations in internal and external flows are studied using computational fluid dynamics (CFD) analysis. The CFD analysis is carried out at Mach numbers from 0.1 to 3.0. From the results, it has been found that the flow field in the base region of internal and external suddenly expanded flows are nearly the same. The base pressure in external flow can be studied relatively easily by considering it as an internal flow for Mach numbers in the range of 0.1 to 0.4 and 1.4 to 3.0, except when the Mach number is close to unity. Penerbit Akademia Baru 2019 Article PeerReviewed application/pdf en http://irep.iium.edu.my/71853/1/CFDLV11_N4_P32_40.pdf application/pdf en http://irep.iium.edu.my/71853/7/71853_Investigation%20of%20base%20pressure%20variations%20_scopus.pdf Pathan, Khizer Ahmed and Dabeer, Prakash S and Khan, Sher Afghan (2019) Investigation of base pressure variations in internal and external suddenly expanded flows using CFD analysis. CFD Letters, 11 (4). pp. 32-40. ISSN 2180-1363 http://www.akademiabaru.com/doc/CFDLV11_N4_P32_40.pdf
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English English
topic	TL500 Aeronautics
spellingShingle	TL500 Aeronautics Pathan, Khizer Ahmed Dabeer, Prakash S Khan, Sher Afghan Investigation of base pressure variations in internal and external suddenly expanded flows using CFD analysis
description	The Aerodynamic base drag because of negative pressure at the backward-facing step is a general obstacle connected with all the moving projectiles. The aerodynamic base drag is undesirable since its contribution to the cumulative drag is substantial. The study of pressure variations in the base region is of immense help for all moving projectiles. The experimental study of aerodynamic drag over missile/ projectile in a wind tunnel has various disadvantages like a considerable amount of air supply is required to conduct the test, the support mechanism is required to hold the model in the wind tunnel test section which creates disturbance in the flow field and introduce the errors in the measurements. In this research paper, the similarities of base pressure variations in internal and external flows are studied using computational fluid dynamics (CFD) analysis. The CFD analysis is carried out at Mach numbers from 0.1 to 3.0. From the results, it has been found that the flow field in the base region of internal and external suddenly expanded flows are nearly the same. The base pressure in external flow can be studied relatively easily by considering it as an internal flow for Mach numbers in the range of 0.1 to 0.4 and 1.4 to 3.0, except when the Mach number is close to unity.
format	Article
author	Pathan, Khizer Ahmed Dabeer, Prakash S Khan, Sher Afghan
author_facet	Pathan, Khizer Ahmed Dabeer, Prakash S Khan, Sher Afghan
author_sort	Pathan, Khizer Ahmed
title	Investigation of base pressure variations in internal and external suddenly expanded flows using CFD analysis
title_short	Investigation of base pressure variations in internal and external suddenly expanded flows using CFD analysis
title_full	Investigation of base pressure variations in internal and external suddenly expanded flows using CFD analysis
title_fullStr	Investigation of base pressure variations in internal and external suddenly expanded flows using CFD analysis
title_full_unstemmed	Investigation of base pressure variations in internal and external suddenly expanded flows using CFD analysis
title_sort	investigation of base pressure variations in internal and external suddenly expanded flows using cfd analysis
publisher	Penerbit Akademia Baru
publishDate	2019
url	http://irep.iium.edu.my/71853/ http://irep.iium.edu.my/71853/ http://irep.iium.edu.my/71853/1/CFDLV11_N4_P32_40.pdf http://irep.iium.edu.my/71853/7/71853_Investigation%20of%20base%20pressure%20variations%20_scopus.pdf
first_indexed	2023-09-18T21:41:53Z
last_indexed	2023-09-18T21:41:53Z
_version_	1777413194336174080

Investigation of base pressure variations in internal and external suddenly expanded flows using CFD analysis

Similar Items