|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||137/013 ; 114/067A|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 2 인용 특허 : 7|
Skin friction reduction on a surface moving relative to a fluid can be obtained by ejecting a polymer-water mixture/solution into the boundary layer. The efficacy of the ejected polymer-water mixture/solution is closely related to polymer dissipation out of the boundary layer and conditioning (i.e, lengthening, unwinding or stretching) of the polymer molecules by liquid shear forces immediately before ejection. The invention is a method and apparatus for conditioning and ejecting a polymer-water mixture/solution that improves drag reduction characteristi...
[ What is claimed is:] [1.] A method of conditioning a drag-reducing substance prior to its release into a first fluid, and of releasing it into the first fluid, there being relative motion between said first fluid and a first surface so as to form a first fluid flow path, said method comprising the following steps:(a) conditioning the drag-reducing substance using fluid shear forces by causing a second fluid which includes said drag-reducing substance to flow between surfaces having conditioning means to thereby cause the drag-reducing molecules in said...