Thermal mixing effect and heat transfer in U-shaped notch on the mechanical seal face

Abstract

A three-dimensional thermohydrodynamic (THD) model of a notched mechanical seal is developed based on the commercial software ANSYS Fluent. The flow behavior of hot and cold fluid in and around the notch, namely, the thermal mixing effect, is detailly analyzed. The heat transfer between the notch fluid and the seal rings as well as the cooling effect mechanism of the notch are discussed. Finally, a parametric analysis is conducted to study the effect of notch size, rotational speed and seal gap on heat transport. The results show that the notch fluid locally decreases the notched stator face temperature around the notch boundaries. The reflux occurs between the sealing chamber and notch, which brings the most cooling effect to the notch. The notch depth and width have a significant effect on the heat transfer between the fluid and sealing rings. Because of the non-simplified THD model, the proposed research provides increased reliability of understanding the flow and temperature behavior in the notch.

Keywords

Mechanical seal thermohydrodynamic deep notch CFD

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References

Mayer

Thermohydrodynamic in mechanical seals. In: Proceedings of the 4th international conference on fluid sealing, Philadelphia, USA, May 5 1969, pp.124–128. Bedford: BHRA.

Fuse

Shimizu

Nishiyama

Development of high reliable mechanical seal for nuclear power plant. In: Proceedings of the 17th international conference on fluid sealing, York, UK, April 8–10 2003, pp. 405–419. Bedford: BHRA.

Key

Salant

Payvar

, et al. Analysis of a mechanical seal with deep hydropads. Tribol Trans 1989; 32: 481–489.

Danos

Tournerie

Frêne

Notched rotor face effects on thermohydrodynamic lubrication in mechanical face seal. Tribology Series 2000; 38: 251–259.

Tournerie

Danos

FrêNe

Three-dimensional modeling of THD lubrication in face seals. J Tribol 2001; 123: 196–204.

Djamai

Brunetière

Tournerie

Numerical modeling of thermohydrodynamic mechanical face seals. Tribol Trans 2010; 53: 414–425.

Ettles

CMM

Cameron

Considerations of flow across a bearing groove. J Lubr Technol 1968; 90: 312–319.

Heshmat

Pinkus

Mixing inlet temperatures in hydrodynamic bearings. J Tribol 1986; 108: 231–244.

Kosasih

Tieu

AK.

An investigation into the thermal mixing in journal bearings. Proc IMechE,

Part J: J Engineering Tribology 2004; 218: 379–389.

10.

Chun SM and Ha DH. Study on mixing flow effects in a high-speed journal bearing. Tribol Int 2001; 34: 397–405.

11.

Brito

Miranda

Claro

JCP

, et al. The role of lubricant feeding conditions on the performance improvement and friction reduction of journal bearings. Tribol Int 2014; 72: 65–82.

12.

Hagemann T and Schwarze H. A model for oil flow and fluid temperature inlet mixing in hydrodynamic journal bearings. J Tribol 2018; 141: 021701.

13.

Lebeck

AO.

Principles and design of mechanical face seals. New York: John Wiley and Sons, 1991.

14.

Etsion

Pascovici

MD.

A thermohydrodynamic analysis of a misaligned mechanical face seal. Tribol Trans 1993; 36: 589–596.

15.

Pascovici

Etsion

A thermo-hydrodynamic analysis of a mechanical face seal. Tribol Trans 1992; 114: 639–645.

16.

Blasiak

Pawinska

Direct and inverse heat transfer in non-contacting face seals. Int J Heat Mass Transf 2015; 90: 710–718.

17.

Błasiak

Kundera

A numerical analysis of the grooved surface effects on the thermal behavior of a non-contacting face seal. Procedia Eng 2012; 39: 315–326.

18.

Luan

Khonsari

MM.

Numerical simulations of the flow field around the rings of mechanical seals. J Tribol 2006; 128: 559–565.

19.

Luan

Khonsari

MM.

Computational fluid dynamics analysis of turbulent flow within a mechanical seal chamber. J Tribol 2007; 129: 120–128.

20.

Jiang

Yang

Three-dimensional coupling analysis of flow and thermal performance of a mechanical seal. J Therm Sci Eng Appl 2014; 6: 011012.

21.

Shirazi

Soulisa

Lebeck

, et al. Fluid temperature and film coefficient prediction and measurement in mechanical face seals – numerical results. Tribol Trans 1998; 41: 459–470.

22.

Lebeck

Nygren

Shirazi

, et al. Fluid temperature and film coefficient prediction and measurement in mechanical face seals – experimental results. Tribol Trans 1998; 41: 411–422.

23.

Merati

Okita

Phillips

, et al. Experimental and computational investigation of flow and thermal behavior of a mechanical seal. Tribol Trans 1999; 42: 731–738.

24.

Meng

Zhao

Shen

, et al. Thermohydrodynamic analysis on herringbone-grooved mechanical face seals with a quasi-3D model. Proc IMechE, Part J: J Engineering Tribology 2018; 232: 1402–1414.