Power lost due to friction in a propeller

Click For Summary
SUMMARY

The discussion focuses on calculating the power lost due to friction in a propeller system with specific parameters: diameter (d) of 0.36 meters, rotational speed (rpm) of 200, velocity (u) of 0.72 m/s, propeller length of 1 meter, and oil viscosity of 0.23 m²/s. The key equations involved include power calculated as torque multiplied by angular velocity, and the need to determine area, velocity, and work done per second. The discussion emphasizes the importance of understanding kinematic viscosity in this context.

PREREQUISITES
  • Understanding of kinematic viscosity and its implications in fluid dynamics
  • Familiarity with torque and angular velocity calculations
  • Knowledge of power equations in mechanical systems
  • Basic principles of friction and its effects on mechanical efficiency
NEXT STEPS
  • Research the calculation of torque in rotating systems
  • Learn about the relationship between viscosity and friction in fluids
  • Explore the application of the power equation in mechanical systems
  • Study the effects of propeller design on efficiency and power loss
USEFUL FOR

Mechanical engineers, physics students, and anyone involved in the design and analysis of propeller systems or fluid dynamics applications.

Abigail1997
Messages
6
Reaction score
0
Screen Shot 2016-07-29 at 17.19.02.png
1. Homework Statement
Calculate the power lost in friction in the system shown above, with d=0.36, rpm=200, u=0.72, prop=1m and oil=0.23m

Homework Equations


I know p=w/t comes into it in some form, either with other equations subbed in or a derivation somewhere, but not sure.

The Attempt at a Solution

 
Physics news on Phys.org
Power = torque * angular velocity
 
  • Like
Likes   Reactions: Abigail1997

Similar threads

AC Cirucits - Impedance Values
  • · Replies 5 ·
Replies
5
Views
2K
Engineering A car on a hill - power of motor problem
  • · Replies 15 ·
Replies
15
Views
3K
Why is the Pumping Power Calculation Resulting in a Negative Value?
  • · Replies 22 ·
Replies
22
Views
3K
Simple Gear Train Efficiency and Torque Help
  • · Replies 26 ·
Replies
26
Views
23K
Gear train torque / power and load?
  • · Replies 4 ·
Replies
4
Views
7K
Calculating Gear Train Efficiency & Input Power | Homework Solution
  • · Replies 10 ·
Replies
10
Views
5K
Effect of Load Torque on Belt Tension and Power Transmission
  • · Replies 12 ·
Replies
12
Views
7K
Pumping effect in a pipe system
  • · Replies 7 ·
Replies
7
Views
2K
Maximum pull-off load, axial load and radial load of two strapped pipes
  • · Replies 1 ·
Replies
1
Views
3K
High School How Does Blackbird Leverage Wind Power to Move Faster Than the Wind?
  • · Replies 69 ·
3
Replies
69
Views
17K