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특허 상세정보

Design of viscoelastic coatings to reduce turbulent friction drag

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) G01N-019/02    G01N-003/56   
미국특허분류(USC) 073/010
출원번호 UP-0054719 (2005-02-10)
등록번호 US-RE41398 (2010-07-19)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Arnold International
인용정보 피인용 횟수 : 1  인용 특허 : 12

A method is provided to select appropriate material properties for turbulent friction drag reduction, given a specific body configuration and freestream velocity. The method is based on a mathematical description of the balance of energy at the interface between the viscoelastic surface and the moving fluid, and permits determination of the interaction of turbulent boundary layer fluctuations with a viscoelastic layer by solving two subtasks—i.e., a hydrodynamic problem and an elasticity problem, which are coupled by absorption and compliancy coef...


What is claimed is: 1. A method for estimating the reduction in friction drag of a body with a viscoelastic coating as compared to the friction drag of a rigid surface of identical size and shape as said body, during turbulent flow at a specified freestream velocity, said method comprising the following steps, performed in the order indicated: (I) using boundary conditions for a rigid surface, determining characteristics of a turbulent boundary layer at the specified freestream velocity, said characteristics including the boundary layer thickness, phas...

이 특허에 인용된 특허 (12)

  1. Savill Anthony M. (Cambridge GB2). Boundary layer devices. USP1989094865271.
  2. Pratt William F.. Continuous wave composite viscoelastic elements and structures. USP2001096287664.
  3. Falco Robert E. (East Lansing MI). Drag reduction method and surface. USP1992075133519.
  4. Li Ying-Hsiao (Plano TX). Drag reduction method for gas pipelines. USP1991065020561.
  5. Kirschner Ivan N.. Flow control system having actuated elastomeric membrane. USP2000026024119.
  6. Kenneth J. Moore ; Thomas D. Ryan ; Vladimir A. Gorban UA; Victor V. Babenko UA. Method and apparatus for increasing the effectiveness and efficiency of multiple boundary layer control techniques. USP2002036357374.
  7. Kamiadakis George Em ; Du Yiging. Method and apparatus for reducing turbulent drag. USP2001126332593.
  8. Blackwelder Ron F. (30531 Rue Langlois Rancho Palos Verdes CA 90274) Gad-el-Hak Mohamed (15275 Hunting Ridge Trail Granger IN 46530). Method and apparatus for reducing turbulent skin friction. USP1990064932612.
  9. Baxter Steven L. (Ponca City OK) Lewis Max H. (Waverly TN). Method for improving the performance of highly viscous concentrates of high molecular weight drag reducing polymers. USP1988094771799.
  10. Whitmore, Stephen A.; Saltzman, Edwin J.; Moes, Timothy R.; Iliff, Kenneth W.. Method for reducing the drag of blunt-based vehicles by adaptively increasing forebody roughness. USP2005056892989.
  11. Wang Guan-Hwa (Potomac MD) Wang Zen-Yow (Elliott City MD) Lein Horngshyang (Columbia MD). Real-time analysis of power plant thermohydraulic phenomena. USP1997045619433.
  12. Bronowicki Allen J. (Laguna Niguel CA) Kaplan Abner (Rancho Palos Verdes CA). Viscoelastic damping structures and related manufacturing method. USP1994085342465.