Download presentation

Presentation is loading. Please wait.

Published byLina Joachim Modified over 2 years ago

1
ME 814.3 T2: Compressible Flow Instructor: Maryam Einian Email: mae345@mail.usask.camae345@mail.usask.ca CFD lab: 1B85 1

2
Tests 1. Discharge of compressed air from a tank 2. Flow through a converging-diverging nozzle 2

3
Discharge of compressed air from a tank Fill the tank Discharge the tank Observe the pressure and temperature variation in time 3

4
Formulation Quasi-steady process: unsteady continuity steady energy equation

5
Converging-Diverging nozzle 5 Application: Propulsion and the High speed flow of gases. Mass Flow Rate: Low Pressure at the back ? More mass flow rate

6
Subsonic Flow (M<1) 6 1- Nozzle isn't choked 2- Accelerates through the converging section 3- Reaches its maximum speed at the throat. 5- Lowering the back pressure increases the flow speed everywhere in the nozzle. 4- Decelerates through the diverging section.

7
Sonic Flow (M=1) 7 1- Nozzle is choked 2- Accelerates through the converging section 3- Reaches its maximum speed at the throat. (M=1) 4- Decelerates through the diverging section.

8
Supersonic Flow (M>1) 8 1- Nozzle is choked 2- Accelerates through the converging section 3- Reaches its maximum speed at the throat. 4- Accelerates through the diverging section.

9
Shock Wave 9 1- Nozzle is choked 2- Accelerates through the converging section 3- Reaches its maximum speed at the throat. 4- Accelerates through the diverging section. 5- Shock wave occurs. 6- Decelerates through the diverging section.

10
Conservation 10 Conservation of mass Conservation of energy Conservation of momentum

11
Isentropic Flow 11 A perfect gas

12
Shock Wave 12 Highly irreversibleNo isentropic process

13
13 Mass Flow Rate

14
Objectives To obtain the pressure distribution along a converging-diverging nozzle. To compare the experimental results with the theoretical calculations. 14

15
SupersonicShock waveSubsonic P os =; P tank =, P b =; T o = xPressure, P s x x 15 Data Acquisition

16
What Do We Require To Obtain From The Raw Data? 16

17
17 Dimensions of Converging-Diverging Nozzle

18
A Summary of Important Quantities R12.70 mm0.500 in DtDt 14.78 mm0.582 in D probe 1.50 mm0.059 in P atm To be measured k1.40 R air 287 J/KgK1717 ft 2 /s 2o R 18

19
19

20
20

21
21

22
22

23
23

Similar presentations

Presentation is loading. Please wait....

OK

Chapter 5 MASS AND ENERGY ANALYSIS OF CONTROL VOLUMES

Chapter 5 MASS AND ENERGY ANALYSIS OF CONTROL VOLUMES

© 2018 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on chinese food Ppt on ufo and aliens videos Ppt on electric meter testing jobs Presentations ppt online maker Ppt on computer languages salary Ppt on obesity prevention foundation Ppt on resistance temperature detector definition Ppt on quality education academy Jit ppt on manufacturing news Ppt on political parties and electoral process united