Naval Postgraduate School
Dudley Knox Library
NPS Dudley Knox Library
View Item 
  •   Calhoun Home
  • Faculty and Researchers
  • Faculty and Researchers' Publications
  • View Item
  •   Calhoun Home
  • Faculty and Researchers
  • Faculty and Researchers' Publications
  • View Item
  • How to search in Calhoun
  • My Accounts
  • Ask a Librarian
JavaScript is disabled for your browser. Some features of this site may not work without it.

Browse

All of CalhounCollectionsThis Collection

My Account

LoginRegister

Statistics

Most Popular ItemsStatistics by CountryMost Popular Authors

Laser Velocimetry Measurements of Oscillating Airfoil Dynamic Stall Flow Field

Thumbnail
Download
IconChandrasekhara_Laser Velocimetry_1991.pdf (1.181Mb)
Download Record
Download to EndNote/RefMan (RIS)
Download to BibTex
Author
Chandrasekhara, M.S.
S.Ahmed
Date
1991
Metadata
Show full item record
Abstract
Ensemble averaged two components velocity measurements over an airfoil experiencing oscillatory dynamic stall under compressibility conditions were obtained. The measurements show the formation of a separation bubble over the airfoil that persists till angles of attack close to when the dynamic stall vortex forms and convects. The fluid attains mean velocities as large as 1.6 times the free stream velocity (U(infinity)) with instantaneous values of 1.80 U(infinity). The airfoil motion induces these large velocities in regions that are far removed from its surface. Also, depending upon the behavior of the separation bubble, the wall jet profiles near the leading edge region could become wake like over the airfoil in a cycle at different phase angles. Vorticity contours indicate that the levels around the leading edge continuously increase till the vortex begins to convect. Some of the measurements difficulties, especially, particle behavior are discussed as well.
Description
AIAA Paper 91-1799, Jun. 1991, Honolulu, HI.
URI
https://hdl.handle.net/10945/50041
Collections
  • Faculty and Researchers' Publications

Related items

Showing items related by title, author, creator and subject.

  • Thumbnail

    Compressible Dynamic Stall Control using a Variable Droop Leading Edge Airfoil 

    Chandrasekhara, M.S.; Martin, P.B.; Tung, C. ;
    The control of compressible dynamic stall using a variable droop leading edge airfoil is described. The leading 25% of a VR-12 airfoil is drooped as it executes sinusoidal pitch oscillations such that the leading portion ...
  • Thumbnail

    Experimental investigation of low speed flow over flapping airfoils and airfoil combinations 

    Mahmoud, Osama Mohamed Kamal Mohamed (Monterey, California. Naval Postgraduate School, 2001-09);
    A wind tunnel investigation of low speed flow over flapping airfoils and airfoil combinations was performed using flow visualization and laser Doppler velocimetry. Specifically, three cases were studied: A NACA0014 airfoil ...
  • Thumbnail

    Experimental investigation of low speed flow over flapping airfoils and airfoil combinations 

    Mahmoud, Osama Mohamed Kamal Mohamed (Monterey, California. Naval Postgraduate School, 2001-09);
    A wind tunnel investigation of low speed flow over flapping airfoils and airfoil combinations was performed using flow visualization and laser Doppler velocimetry. Specifically, three cases were studied: A NACA0014 airfoil ...
NPS Dudley Knox LibraryDUDLEY KNOX LIBRARY
Feedback

411 Dyer Rd. Bldg. 339
Monterey, CA 93943
circdesk@nps.edu
(831) 656-2947
DSN 756-2947

    Federal Depository Library      


Start Your Research

Research Guides
Academic Writing
Ask a Librarian
Copyright at NPS
Graduate Writing Center
How to Cite
Library Liaisons
Research Tools
Thesis Processing Office

Find & Download

Databases List
Articles, Books & More
NPS Theses
NPS Faculty Publications: Calhoun
Journal Titles
Course Reserves

Use the Library

My Accounts
Request Article or Book
Borrow, Renew, Return
Tech Help
Remote Access
Workshops & Tours

For Faculty & Researchers
For International Students
For Alumni

Print, Copy, Scan, Fax
Rooms & Study Spaces
Floor Map
Computers & Software
Adapters, Lockers & More

Collections

NPS Archive: Calhoun
Restricted Resources
Special Collections & Archives
Federal Depository
Homeland Security Digital Library

About

Hours
Library Staff
About Us
Special Exhibits
Policies
Our Affiliates
Visit Us

NPS-Licensed Resources—Terms & Conditions
Copyright Notice

Naval Postgraduate School

Naval Postgraduate School
1 University Circle, Monterey, CA 93943
Driving Directions | Campus Map

This is an official U.S. Navy Website |  Please read our Privacy Policy Notice  |  FOIA |  Section 508 |  No FEAR Act |  Whistleblower Protection |  Copyright and Accessibility |  Contact Webmaster

Export search results

The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

A logged-in user can export up to 15000 items. If you're not logged in, you can export no more than 500 items.

To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.