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REPORT DOCUMENTATION PAGE 



READ INSTRUCTIONS 

 BEFORE COMPLETING FORM 



I. REPORT NUMBER 



DTNSRDC-78/081 



2. GOVT ACCESSION NO 



3. RECIPIENT'S CATALOG NUMBER 



4. TITLE (and Subtitle) 



A NOTE ON BLOCKAGE CORRECTION 



5. TYPE OF REPORT ft PERIOD COVERED 



6. PERFORMING ORG. REPORT NUMBER 



7. AUTHORS 



Kwang June Bai 



8. CONTRACT OR GRANT NUMBERfsJ 



9. PERFORMING ORGANIZATION NAME AND ADDRESS 



David W. Taylor Naval Ship Research 

 and Development Center 

 Bethesda, Maryland 20084 



Task Area ZR Oil 0201 

 Element 61152N 



II. CONTROLLING OFFICE NAME AND ADDRESS 



David W. Taylor Naval Ship Research 

 and Development Center 

 Bethesda, Maryland 20084 



12. REPORT DATE 



November 1978 



13. NUMBER OF PAGES 

 33 



14. MONITORING AGENCY NAME ft ADDRESSff/ different from Controlling Office) 



IS. SECURITY CLASS, (of this report) 



UNCLASSIFIED 



16. DISTRIBUTION ST ATEMEN T (of this Report) 



APPROVED FOR PUBLIC RELEASE: DISTRIBUTION UNLIMITED 



17. DISTRIBUTION STATEMENT (of the abstract entered In Block 20, it different from Report) 



IS. SUPPLEMENTARY NOTES 



9. KEY WORDS (Continue on reverse side it necessary and identity by block number) 



Blockage correction, Mean speed correction formula, 

 Towing tank experiment, Wind tunnel experiment 



20. ABSTRACT (Continue 



aide it necessary and identify by block number) 



It has recently been shown that a jump in velocity potential exists 

 between infinite upstream and downstream directions when a body translates 

 uniformly along a channel of finite cross section such as a towing tank or 

 wind tunnel. In this report a new blockage correction formula for bodj T 

 speed is proposed. The speed correction formula due to blockage is 



(Continued on reverse side) 



0D l jan 73 1473 EDITION OF 1 NOV 65 IS OBSOLETE 



S/N 01 02-LF-01 4-6601 



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