Impact of Jet
CVE3208 | Fluid Mechanics | Lab Report | 2012
Experiment 2 Impact of Jet
CVE3208 Fluid Mechanics
Ahmed Sujeeth I11009050 BCEGI - Semester 4
Lecturer: Dr. Khin Maung Win
19th November 2012
Page 1 of 9
Ahmed Sujeeth | I11009050 | BCEGI
CVE3208 | Fluid Mechanics | Lab Report | 2012 Title : Impact of Jet To investigate the validity of theoretical expressions for the force exerted by a jet on targets of various shapes. The impact of jet on a surface is a common day engineering application. One such example is the application of this principle on the Pelton wheel where power is generated due to the force of the jet which hits the bucket, which in turn rotates the wheel. Although it has been proven that there is loss of energy due to the impact and also loss in pipe flow, this method remains one of the most effective proven principles of generating power. To predict the maximum or minimum output of such engineering applications, the deflection and force of the jet on various geometrical variations must be determined. This experiment deals with verifying the expression of force due to impact of the jet on a variety of geometrical plates. By Newton’s second law of motion, F ma F ṁ change in velocity where Mass low per unit time ṁ F ρav v v cosθ Fy ρQ v v cosθ where v For flat targets (90°) Fy ρQ v v cos 90 Q 0 Fy ρQ A ρQ Fy For 120° targets, Fy ρQ v v cos 120 Q Q0.5 Fy ρQ A A 3ρQ Fy 2A
Objective
:
Theory
:
ρav
Page 2 of 9
Ahmed Sujeeth | I11009050 | BCEGI
CVE3208 | Fluid Mechanics | Lab Report | 2012 For hemispherical 180° targets, Fy ρQ v vcos 180 Fy Fy Theoretical force calculation Fy Mg The flow rate was measured using the apparatus discharge .The force of impact was determined by calculation using the above formulas and compared with the theoretical force. ρQ
Apparatus/ Equipment : Hydraulic bench F1-10, Impact of Jet Apparatus F1-16 Stopwatch Vernier caliper
Schematic Diagram
1) 2) 3) 4) 5) 6) 7) 8) 9)
Outlet hole Container top plate
Experiment 2 Impact of Jet
CVE3208 Fluid Mechanics
Ahmed Sujeeth I11009050 BCEGI - Semester 4
Lecturer: Dr. Khin Maung Win
19th November 2012
Page 1 of 9
Ahmed Sujeeth | I11009050 | BCEGI
CVE3208 | Fluid Mechanics | Lab Report | 2012 Title : Impact of Jet To investigate the validity of theoretical expressions for the force exerted by a jet on targets of various shapes. The impact of jet on a surface is a common day engineering application. One such example is the application of this principle on the Pelton wheel where power is generated due to the force of the jet which hits the bucket, which in turn rotates the wheel. Although it has been proven that there is loss of energy due to the impact and also loss in pipe flow, this method remains one of the most effective proven principles of generating power. To predict the maximum or minimum output of such engineering applications, the deflection and force of the jet on various geometrical variations must be determined. This experiment deals with verifying the expression of force due to impact of the jet on a variety of geometrical plates. By Newton’s second law of motion, F ma F ṁ change in velocity where Mass low per unit time ṁ F ρav v v cosθ Fy ρQ v v cosθ where v For flat targets (90°) Fy ρQ v v cos 90 Q 0 Fy ρQ A ρQ Fy For 120° targets, Fy ρQ v v cos 120 Q Q0.5 Fy ρQ A A 3ρQ Fy 2A
Objective
:
Theory
:
ρav
Page 2 of 9
Ahmed Sujeeth | I11009050 | BCEGI
CVE3208 | Fluid Mechanics | Lab Report | 2012 For hemispherical 180° targets, Fy ρQ v vcos 180 Fy Fy Theoretical force calculation Fy Mg The flow rate was measured using the apparatus discharge .The force of impact was determined by calculation using the above formulas and compared with the theoretical force. ρQ
Apparatus/ Equipment : Hydraulic bench F1-10, Impact of Jet Apparatus F1-16 Stopwatch Vernier caliper
Schematic Diagram
1) 2) 3) 4) 5) 6) 7) 8) 9)
Outlet hole Container top plate
References: & Appendix : Fluid Mechanics – Douglas/Gasiorek/Swaffield/Jack http://en.wikipedia.org Page 9 of 9 Ahmed Sujeeth | I11009050 | BCEGI