JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Course Objectives

• 1. The basic concept and importance of gas dynamics
• 2. Understand of the Isentropic and non-isentropic flows
• 3. Interpret the flow pattern in flow and non-flow systems
• 4. Awareness on two-dimensional flow and related parameters
• 5. Explore to Unsteady wave motions

Course Outcomes

• 1. Explain basic concepts of gas dynamics and describe the basic fundamental equations of one- dimensional flow of compressible fluid and isentropic flow of an ideal gas.
• 2. Analyze the steady one-dimensional is entropic flow, frictional flow and isothermal flow and express the concepts of steady one-dimensional flow with heat transfer.
• 3. Discuss the effect of heat transfer on flow parameters while passing through nozzles and diffusers
• 4. Describe the significance two-dimensional flow, impact of Shock waves etc.
• 5. Infer the salient features of Unsteady wave motions, Incident and reflected expansion waves

UNIT - I: Basic Concepts

Introduction to compressible flow, A brief review of thermodynamics and fluid

mechanics, Integral forms of conversion equations, Differential conversion equations, Continuum Postulates, Acoustic speed and Mach number, Governing equation for compressible flows.

UNIT - II: One- dimensional compressible flow

One dimensional flow concepts, Isentropic flows,

Stagnation/ Total conditions, Characteristics speeds of gas dynamics, Dynamic pressure and pressure coefficients, Normal Shock waves, Rankine-Hugonoit equations, Rayleigh flow, Fanno flow, Crocco’ theorem.

UNIT - III: Quasi-one dimensional flows

Governing equations, Area velocity relations, Isentropic flow

through variable-area ducts, Convergent divergent (or De Laval) nozzles, Over-expanded and under expanded nozzle, Diffusers.

UNIT - IV: Two- dimensional Flow

Oblique shock wave and its governing equations, e-B-M relations, The

Hodograph and Shock polar, Supersonic flow over wedges and cones, Mach line, Attached and Detached shock, Reflection and Interaction of oblique shock waves, Supersonic flow over convex and concave corners, Approximation of continuous expansion waves by discrete waves.

UNIT - V: Unsteady wave motions

Moving normal shock waves, Reflected shock waves, Physical features

of wave propagation, Elements of acoustic Thermal Engineering theory, Incident and reflected expansion waves, Finite compression waves, Shock tube relations.

REFERENCES:

• 1. Gas Dynamics-S.M. Yahya
• 2. Gas Dynamics- Radha Krishnan
• 3. Compressible Fluid Dynamic – B K Hodge, Keith Koenig, Pearson Publications, I edition
• 4. Gas Dynamics- Zucker.
• 5. Dynamics and Thermodynamics of compressible fluid flow (Vol.: I, II)-Ascher H.Shapiro
• 6. Elements of Gas dynamics -H. W. Liepmann, A. Roshko
• 7. Fundamentals of Gas Dynamics-V.Babu
• 8. Modern compressible flow – John.D. Anderson, Jr. M.Tech, II Year, I Sem