Preview

Tesla Turbine

Powerful Essays
Open Document
Open Document
7857 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Tesla Turbine
Computers & Fluids 88 (2013) 344–353

Contents lists available at ScienceDirect

Computers & Fluids journal homepage: www.elsevier.com/locate/compfluid

Analytical and computational solutions for three-dimensional flow-field and relative pathlines for the rotating flow in a Tesla disc turbine
Sayantan Sengupta, Abhijit Guha ⇑
Mechanical Engineering Department, Indian Institute of Technology, Kharagpur, Kharagpur 721302, India

a r t i c l e

i n f o

Article history:
Received 22 December 2012
Received in revised form 18 June 2013
Accepted 8 September 2013
Available online 19 September 2013
Keywords:
Tesla turbine
Absolute pathline
Relative pathline
3-D CFD simulation
Flow reversal

a b s t r a c t
The three-dimensional flow field and the flow pathlines within a Tesla disc turbine have been investigated analytically and computationally. The description of the flow field includes the three-dimensional variation of the radial velocity, tangential velocity and pressure of the fluid in the flow passages within the rotating discs. A detailed comparison between the results obtained from the analytical theory and computational fluid dynamic (CFD) solutions of Navier–Stokes equations is presented in order to establish the reliability of the simplified mathematical model. The present work reveals the dependence of the shape, size and orientation of the pathlines on various operating parameters (such as tangential speed ratio, radial pressure drop, inlet nozzle angle, and position of the exit) and local balance of various forces
(viz. inertial, viscous, centrifugal and Coriolis). The relative merits of two possible ways of representing the pathlines in the absolute and relative frame of reference are discussed that provide physical understanding of subtle flow features.
Ó 2013 Elsevier Ltd. All rights reserved.

1. Introduction
The study of detecting and analysing fluid path is important in various fields of fluid dynamics, such as in atmospheric



References: [10] Guha A. Computation, analysis and theory of two-phase flows. Aeronaut J 1998;102(1012):71–82. [21] Guha A. Optimisation of aero gas turbine engines. Aeronaut. J 2001;105(1049):345–58. S. Sengupta, A. Guha / Computers & Fluids 88 (2013) 344–353 [25] Hoya GP, Guha A microstructured wall surfaces. Phys Fluids 2011;23(8) [Art. No. 082003].

You May Also Find These Documents Helpful

  • Good Essays

    Nt1310 Unit 3 Lab Report

    • 3999 Words
    • 16 Pages

    This solution is then used as initial value for the transient simulation. In the unsteady simulations, the motion of the center blade was prescribed by a set of equations for the requested mode. The correctness of the imposed motion is confirmed by an analytical model. A timemarching solution was acquired spanning typically 3 oscillation periods. The flow could be regarded as time periodic already after the second oscillation cycle (criterion used: >0.5% phase-locked difference). A time trace of unsteady pressure coefficient at a chosen point on the blade surface is presented in Figure 6.3. One oscillation period was resolved by 20 time steps and with three iteration loops per time…

    • 3999 Words
    • 16 Pages
    Good Essays
  • Satisfactory Essays

    Excercise 5 Activity 1

    • 553 Words
    • 2 Pages

    2. Explain the effect that the flow tube radius change had on flow rate. How well did the results compare with your…

    • 553 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Physio 9.0 Cardio Lab Report

    • 2277 Words
    • 10 Pages

    3. Describe the effect that radius changes have on the laminar flow of a fluid.…

    • 2277 Words
    • 10 Pages
    Good Essays
  • Satisfactory Essays

    3. Describe the effect that radius changes have on the laminar flow of a fluid.___…

    • 556 Words
    • 3 Pages
    Satisfactory Essays
  • Good Essays

    (a) Suppose an object is moving in a plane and we choose to describe it using an x-y coordinate system. If the object is at location x1, y1 at time t1 and at location x2, y2 at time t2, then it has been “displaced.” The mathematical definition of its displacement vector is…

    • 1266 Words
    • 4 Pages
    Good Essays
  • Good Essays

    issues in CRNs, with the objective of satisfying the interference constraints, and maximizing the number…

    • 8009 Words
    • 33 Pages
    Good Essays
  • Good Essays

    Physio Ex Exercise 5

    • 532 Words
    • 3 Pages

    The following questions refer to Activity 4: Studying the Effect of Pressure on Fluid Flow.…

    • 532 Words
    • 3 Pages
    Good Essays
  • Good Essays

    Physiology Answers

    • 3429 Words
    • 15 Pages

    A.the flow of fluid from point A to point B in a tube depends upon the difference in pressure between A and B.…

    • 3429 Words
    • 15 Pages
    Good Essays
  • Powerful Essays

    At the conclusion of this subject students will understand the nature of flows and waves in open…

    • 26806 Words
    • 108 Pages
    Powerful Essays
  • Powerful Essays

    However instead of measuring the time for 10 revolutions, the time for 20 revolutions was measured, this allowed more accurate results to be obtained. Furthermore the lengths given in the book were used as merely guidelines and not followed precisely also 50 and 100-gram masses were used.…

    • 1011 Words
    • 5 Pages
    Powerful Essays
  • Powerful Essays

    Ap Physics B and C Study Guide

    • 51117 Words
    • 205 Pages

    1-1. 1-2. 1-3. 1-4. 1-5. 1-6. 1-7. 1-8. 1-9. 1-10. 1-11. Motion in One Dimension Vectors Motion in Two Dimensions Laws of Motion and Force Vectors Applications of Force Work, Energy, and Power Oscillations Linear Momentum and Collisions Circular Motion and Gravity Introduction to Rotation and Torque Rotation, Rolling, and Angular Momentum B and C course B and C course B and C course B and C course B and C course B and C course B and C course B and C course B and C course B and C course C course only…

    • 51117 Words
    • 205 Pages
    Powerful Essays
  • Satisfactory Essays

    Cardiovascular Dynamics

    • 818 Words
    • 4 Pages

    1. What happened to the fluid flow rate as the radius of the flow tube was increased?…

    • 818 Words
    • 4 Pages
    Satisfactory Essays
  • Powerful Essays

    Open Channel

    • 1357 Words
    • 6 Pages

    Lecture note, CE2001- Civil Engineering Hydraulics. Lecture 4: specific energy and Flow variation in open channels, [Dr Robin Wakelin]…

    • 1357 Words
    • 6 Pages
    Powerful Essays
  • Good Essays

    Kinematics - Cam

    • 354 Words
    • 2 Pages

    Draw also the velocity & acceleration diagrams when the speed of rotation of cam is 100rpm.…

    • 354 Words
    • 2 Pages
    Good Essays
  • Good Essays

    reservoir simulation

    • 3572 Words
    • 15 Pages

    horizontal flow of one fluid, and look at analytical and numerical solutions of pressure as function of position…

    • 3572 Words
    • 15 Pages
    Good Essays