Research on Conjugate Heat Transfer in Mechanical Seals of the Aircraft Engine

According to the mechanical seals’ characters of the aircraft engine: no special flush fluid equipment and the limited space etc, a numerical model of conjugate heat transfer between seal rings and seal chamber is presented. And the flow channel and the flow quantity in the mechanical seal are studied, which will affect the heat transfer between the surface of the seal ring and the flush fluid. At last, the studied results are validated by the test.

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Heat transfer correlations for laminar flows within a mechanical seal chamber

Tribology International ◽

10.1016/j.triboint.2008.10.008 ◽

2009 ◽

Vol 42 (5) ◽

pp. 770-778 ◽

Cited By ~ 17

Author(s):

Zhaogao Luan ◽

M.M. Khonsari

Keyword(s):

Heat Transfer ◽

Laminar Flows ◽

Mechanical Seal ◽

Heat Transfer Correlations ◽

Seal Chamber

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Conjugate heat transfer analysis of an energy conversion device with an updated numerical model obtained through inverse identification

Energy Conversion and Management ◽

10.1016/j.enconman.2015.01.065 ◽

2015 ◽

Vol 94 ◽

pp. 198-209 ◽

Cited By ~ 7

Author(s):

Jonathan Hey ◽

Adam C. Malloy ◽

Ricardo Martinez-Botas ◽

Michael Lamperth

Keyword(s):

Heat Transfer ◽

Numerical Model ◽

Energy Conversion ◽

Conjugate Heat Transfer ◽

Heat Transfer Analysis ◽

Inverse Identification

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Three-Dimensional Coupling Analysis of Flow and Thermal Performance of a Mechanical Seal

Journal of Thermal Science and Engineering Applications ◽

10.1115/1.4025057 ◽

2013 ◽

Vol 6 (1) ◽

Cited By ~ 2

Author(s):

Dazhuan Wu ◽

Xinkuo Jiang ◽

Shuai Yang ◽

Leqin Wang

Keyword(s):

Heat Transfer ◽

Three Dimensional ◽

Coupling Model ◽

Frictional Heat ◽

Mechanical Seal ◽

Mechanical Seals ◽

High Rotational Speed ◽

Flow And Heat Transfer ◽

Sealing Pressure ◽

Thermal Conductivities

To accurately obtain the flow and temperature field in mechanical seals and investigate the key influencing factors, a numerical analysis of flow and heat transfer in a contact mechanical seal with high-sealing pressure, high-operating temperature, and high-rotational speed is presented. A three-dimensional (3D) computational model consisting of seal rings, surrounding flushing fluid, and other seal components is constructed. fluent, a commercial computational fluid dynamics (CFD) software, is used to solve the 3D fluid–solid coupling model. Frictional heat, stirred heat, and convection coefficients are focused on in this study to ensure the reliability of the numerical results. The flow field and temperature distributions of the mechanical seal are presented, and the influence of different flushing fluid temperatures, flushing flow rates, and thermal conductivities of the seal rings on heat transfer is discussed. The results show that the stirred heat (accounting for about 10% of the frictional heat in the present mechanical seal) cannot be ignored for high-parameter mechanical seals. The flushing parameters can only influence temperature magnitudes on the seal rings but have minimal effects on the temperature gradients, which, however, can be well improved by adjusting the thermal conductivities of the seal rings.

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Data Acquisition Prototype Chamber of Mechanical Seals Test Plant API-682 Using NI MY-RIO

SinkrOn ◽

10.33395/sinkron.v3i2.10021 ◽

2019 ◽

Vol 3 (2) ◽

pp. 39

Author(s):

Adhitya Sumardi ◽

Noval Lilansa ◽

Afaf Fadhil Rifai ◽

Fachri Iman ◽

M. Nursyam ◽

...

Keyword(s):

Heat Exchange ◽

Data Acquisition ◽

Study Data ◽

Average Error ◽

Test Plant ◽

Mechanical Seal ◽

Mechanical Seals ◽

Chamber Volume ◽

Relationship Of ◽

Seal Chamber

— Seal Chamber in Mechanical Seal Test Plant is a part that is used for heat exchange between hot liquid fluid in the form of condensed steam and cold liquid fluid in mechanical seal test plant. In heat exchange it is arranged so that the hot fluid can raise and lower the temperature from 20 ℃ to 80 ℃ and vice versa within 1-2 minutes. In the exchange of heat, data acquisition is still needed, which is then processed by data acquisition software that has been calibrated to determine the sensor response to the environment for test plant. In this study, data acquisition and monitoring systems were carried out and multi tasking synchronization with several sensors with one centralized controller. In addition, the volume seal chamber is equipped with a valve regulated by a servo motor to regulate the amount of hot liquid fluid in the form of condensed steam. Valve is used to be a regulator of the flow of hot fluid that enters and exits the seal chamber volume model. This research will be used to control the level and temperature in prototype of the Mechanical Sil test plant according to API 682. The manual control is done and there is an average error for the relationship of the actual valve with the water flow sensor of 8.42%.

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Analysis of conjugate heat transfer and turbulent flow in mechanical seals

Tribology International ◽

10.1016/j.triboint.2008.10.011 ◽

2009 ◽

Vol 42 (5) ◽

pp. 762-769 ◽

Cited By ~ 19

Author(s):

Zhaogao Luan ◽

M.M. Khonsari

Keyword(s):

Heat Transfer ◽

Turbulent Flow ◽

Conjugate Heat Transfer ◽

Mechanical Seals

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Predictions for Non-Contacting Mechanical Face Seal Vibration With External Excitation From Pump Vibration: Part II — Flexibly Mounted Rotor

Volume 7B: Structures and Dynamics ◽

10.1115/gt2018-77200 ◽

2018 ◽

Author(s):

Clay S. Norrbin ◽

Dara W. Childs

Keyword(s):

Excitation Frequency ◽

Harmonic Excitation ◽

Fluid Film ◽

Axial Distance ◽

Mechanical Seal ◽

Seal Ring ◽

Mechanical Seals ◽

Running Speed ◽

Frequency Dependent ◽

Frequency Independent

Stability and response predictions are presented for a Flexibly Mounted Rotor (FMR) mechanical seal ring using the model developed by Childs in 2018. The seal ring is excited by lateral/pitch vibration from the rotor/housing. The model includes a frequency dependent stiffness and damping model for the O-ring and a frequency independent model for the fluid film. The dynamic coefficients are speed and frequency dependent. The mechanical seal is modeled after a typical FMR mechanical seal. Parameters for radius, fluid film clearance, and O-Ring axial distances are varied. The axial distance between the O-Ring and seal ring inertia center doz is found to couple lateral rotor motion and seal ring pitch vibration. The predictions show a dependency on both excitation frequency and running speed. The analyzed FMR has a critical region with high transmissibility in a region around a speed and excitation frequency of 70 kRPM. Another region of high transmissibility is predicted to be with sub-harmonic excitation frequency. The FMR seal ring also has an unstable region that is sub-harmonic of 1% running speed. Running back on the HQ curve for a pump causes broadband sub-harmonic excitaiton, which can cause rub failures for FMR mechanical seals.

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Numerical Simulations of the Flow Field Around the Rings of Mechanical Seals

Journal of Tribology ◽

10.1115/1.2197845 ◽

2006 ◽

Vol 128 (3) ◽

pp. 559-565 ◽

Cited By ~ 27

Author(s):

Zhaogao Luan ◽

M. M. Khonsari

Keyword(s):

Flow Characteristic ◽

Numerical Solutions ◽

Stokes Equations ◽

Simple Algorithm ◽

Correction Method ◽

Navier Stokes ◽

Mechanical Seals ◽

Navier Stokes Equations ◽

Flush Fluid ◽

Seal Chamber

The flow inside a seal chamber as induced by the influx of the flush fluid and the rotation of the primary ring is analyzed. The 3-D flow characteristic around the mating ring and the rotating ring are predicted by solving the Navier-Stokes equations in cylindrical coordinates. For this purpose, the pressure correction method was used in conjunction with the SIMPLE algorithm. A series of numerical solutions is presented that show the flow mechanism within the gap between the rings and the gland. The implication of the flow characteristic on the cooling of the rings is discussed.

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Development of thermal bridge numerical model, based on conjugate heat transfer and indoor and outdoor environment parameters

E3S Web of Conferences ◽

10.1051/e3sconf/202018004011 ◽

2020 ◽

Vol 180 ◽

pp. 04011

Author(s):

Martin Ivanov ◽

Sergey Mijorski

Keyword(s):

Heat Transfer ◽

Boundary Layer ◽

Numerical Model ◽

Flow Velocity ◽

Conjugate Heat Transfer ◽

Wall Roughness ◽

Internal Wall ◽

Velocity Magnitude ◽

Thermal Bridge ◽

Air Flow Velocity

The presented study reveals the development of a 3D numerical model for thermal bridge assessment, based on conjugate heat transfer and CFD methods. With the developed model, thermal simulations are performed, in order to analyse the interaction between different ambient conditions and material properties. The results show that the wall boundary layer profiles are depended on the attached air flow velocity magnitude and implemented wall roughness. The parametric analysis, of the varying ambient air temperatures, confirm the linear dependence to the internal wall surface temperatures. The demonstrated correlations, in regard of the attached air flow velocity magnitude and wall roughness heights, are non-linear. The most characteristic result, achieved in the simulation study, is the impact of the wall roughness, over the internal wall temperature. The increase of the roughness leads to significant increase of the internal wall temperature. Explanation may be found in the boundary layer flow velocity magnitude near the external wall, which decreases the heat energy transfer between the solid and cold fluid medias.

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