Accession Number : AD0829881

Title :   STUDY OF THE SURFACE FILMS OF GAS NUCLEI (AS RELATED TO CAVITATION AND TENSILE STRENGTH IN WATER) PART IV. DISSOLVING OF GAS NUCLEI IN TURBULENT FLOW.

Descriptive Note : Final rept. Jan-Dec 67,

Corporate Author : GENERAL ELECTRIC CO SCHENECTADY NY RESEARCH AND DEVELOPMENT CENTER

Personal Author(s) : Bernd, Leslie H.

Report Date : DEC 1967

Pagination or Media Count : 58

Abstract : This paper is a report of an investigation of the dissolving of gas nuclei (small gas bubbles) in turbulently flowing water in a pipe. The rate of dissolving is important in a circulating water tunnel because it determines whether or not cavitation produced nuclei reach a small enough size to produce tensile strength in the water, increase the cavitation inception level, and affect the results of a cavitation test. The rate of dissolving is greatly affected by the presence of surface films that form about gas nuclei from trace organic materials dissolved in the water. Three distinct dissolving regimes exist: (1) rapid dissolving without a surface film in place, (2) rapid dissolving with an uncompressed surface film, and (3) slow or no dissolving with a compressed surface film. (Author)

Descriptors :   *TURBULENCE), (*FLUID FLOW, PIPES), (*CAVITATION, (*BUBBLES, SOLUBILITY), FILMS, SURFACE PROPERTIES, TENSILE PROPERTIES, WATER, STRENGTH(PHYSIOLOGY), GASES, MASS TRANSFER, NUCLEI.

Subject Categories : Physical Chemistry
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE