Hydrodynamic developments in twin-wire forming - An overview

Paperi ja Puu/Paper and Timber

Volumn 78, Issue 6-7, 1996, Pages 376-381

  Norman, Bo ^a  

^a ROYAL INSTITUTE OF TECHNOLOGY   (Sweden)

Author keywords

[No Author keywords available]

Indexed keywords

CONTRACTION RATIO; FLOW STABILITY; HEADBOX NOZZLE; JET QUALITY; ROLL DEWATERING; TWIN WINE FORMING;

ANISOTROPY; BOUNDARY LAYERS; DEWATERING; FLOCCULATION; HYDRODYNAMICS; JETS; MECHANICAL PULP; NOZZLES; PAPERMAKING MACHINERY; ROLLS (MACHINE COMPONENTS); TURBULENCE;

PAPERMAKING;

EID: 0030156474     PISSN: 00311243     EISSN: None     Source Type: Trade Journal    
DOI: None     Document Type: Review

References (26)

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2. Aidun, C.K, Kovacs, A.: Hydrodynamics of the Forming Section: The origin of Non-uniform Fibre Orientation, Tappi Eng. Conf, Book 1,p. 229, 1994.
3. Norman. B.: Overview of the physics of forming. 9th Fundamental Research Symposium, Cambridge, Part III, 1989.
4. Hauptmann, E., Vyse, R , Mardon, J.. The wake effect as applied to modern hydraulic headboxes. Parts I and II, Pulp & Paper Canada 91 (1990):9, T357.
5. Matsson, J , Alfredsson, H : Experiments on instabilities in curved channel flow, Phys. Fluids A 4 (1992):8, 1666.
6. Söremark, C, Johansson, G., Kiviranta, A . Characterization and Elimination of Fibre Orientation Streaks, Tappi Eng. Conf., Book 1, p. 97, 1994.
7. Söderberg, D.: An Experimental Study of the Stability of Plane Liquid Jets. Graduate thesis, Dep. of Mechanics, The Royal Institute of Technology, Stockholm, 1994.
8. Offerhaus, D.H.. Continuing the Challenge "Blueprinting" a Headbox, 81st Annual Meeting Technical Sect. CPPA, Montreal, A 57, 1995.
9. Wolf, K , Egelhof, D The W-type High-Turbulence Headbox - its development concept and basic arrangement. Paper Techn. 15 (1974):2, 77.
10. Sanford, L.. Characteristics of flow from a two-dimensional nozzle with multiple-tube inlet. Tappi Eng. Conf. A159, 1976.
11. Schlupp, K, Karrila, S , Paulapuro H.: An experimental study of a high speed slice jet, 81st Annual Meeting Technical Sect. CPPA, Montreal, B 199 , 1995.
12. Begemann, U.. The New Headbox Concept with CD Consistency Control, 81st Annual Meeting Technical Sect. CPPA, Montreal, A 305, 1995.
13. Vyse, R., King, J , Heaven, M.: Consistency Profiling for CD Basis Weight Control, 81st Annual Meeting Technical Sect. CPPA, Montreal, A 267, 1995.
14. Duffy, G., Norman, B.: Fibre flocculation in conical contractions simulating the paper machine flowbox slice. Int Symp.Papermachine Headboxes, Montreal, 1(1979), 43.
15. Nordström, B , Norman, B.: Influence of Headbox Nozzle Contraction on Sheet Formation and Anisotropy, Tappi Eng. Conf, Book 1, p. 225, 1994.
16. Unpublished FEX results, 1990.
17. Personal communication, Professor Henrik Alfredsson, Department of Mechanics, Royal Institute of Technology, Stockholm, Nov 20, 1991.
18. Nordström, B., Norman, B.: Development of the STFI-former. Nordic Pulp & Paper Research J. 9(1994):3, 176.
19. Zhao, R.H, Kerekes, R.J.: Pressure Distribution Between Forming Fabrics in Blade Gap formers: Thin Blades. Journ of Pulp and Paper Science 21(1995):3, J97.
20. Zahrai, S., Bark F : On the Fluid Mechanics of Twin Wire Blade Forming in Paper Machines. Accepted for publication in Nordic Pulp and Paper Research J. 10(1995):4, 245.
21. Nigam, M., Bark, F : An analytical method to calculate the flow past a blade in twin-wire formers. Dep. of Mechanics, The Royal Institute of Technology, Stockholm, 1995.
22. Mach, N.: On Variable Permeability during the Dewatering Process in Paper Machines, Graduate thesis, Dep. of Mechanics, The Royal Institute of Technology, Stockholm, 1995.
23. Hermansson, L., Norman, B.: Unpublished FEX results, 1995.
24. Bando, T., Nagano, A., Iwata, H.: Drainage mechanism on a Twin-Wire Former (Part 1), Factors affecting on the drainage phenomena, Japan TAPPI J, 48(1994):7, 76.
25. Nordström, B., Norman, B.: Effects of roll-blade and roll forming on formation, retention, mechanical properties and anisotropy - a preliminary comparison. Accepted for publication in Journ of Pulp and Paper Science, 21(1995):7, J223.
26. Nordström, B., Norman, R: Effects of headbox jet quality and blade pulse force on formation, retention and mechanical properties during roll-blade forming with curved blades. Nordic Pulp and Paper Research J. 10(1995):1, 33.