1 / 9

Basics of GAS DYNAMICS

Basics of GAS DYNAMICS . P M V Subbarao Associate Professor Mechanical Engineering Department I I T Delhi. Alphabets of this new literature called Gas Dynamics . Role of Sonic Velocity in Engineering. c. c. High pressure and High temperature fluid in closed tank. .

aracely
Download Presentation

Basics of GAS DYNAMICS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Basics of GAS DYNAMICS P M V Subbarao Associate Professor Mechanical Engineering Department I I T Delhi Alphabets of this new literature called Gas Dynamics

  2. Role of Sonic Velocity in Engineering c c High pressure and High temperature fluid in closed tank. Stagnation Conditions.

  3. c+w c-w c w w Role of Sonic Velocity in Engineering Velocity of sound at any give flow velocity w.

  4. c+c c-c w w Role of Sonic Velocity in Engineering Define this critical parameter Velocity of sound, c Velocity of sound when flow velocity w=c.

  5. Choking of Nozzle Extent of Valve Opening

  6. Moving Disturbance In A Fluid • As an object moves through a fluid medium it creates pressure waves. • Pressure waves travel out at the speed of sound which in term depends on gas properties and temperature (more on this later). • If the object is traveling significantly slower than sonic velocity, then pressure waves travel out uniformly similar to waves on the surface of a pond.

  7. Moving Disturbance In A Fluid • As the object approaches the speed of sound, it begins to catch up with the pressure waves and creates an infinitesimally weak flow discontinuity just ahead of the aircraft

  8. Moving Disturbance In A Fluid • As the vehicle breaks the speed of sound, the infinitesimally weak Shock waves begin to add up along a “Mach Line” and form a strong pressure wave with highly compressed air, called a shockwave.

  9. Moving Disturbance In A Fluid • As Mach number increases, the strength of the shock wave increases and the Angle of the shockwave becomes increasingly severe • Mach Angle Credit: Selkirk College Professional Aviation Program

More Related