preview

Essay about Cessna 310 Propeller Theory

Better Essays

Table of Contents

Page 1 - Contents

Page 2 - Introduction

Page 2 - Activity 1: Cessna-310 Performance Data

Page 3-4 - Activity 2: Propeller Parameter Definitions

Page 4 - Activity 3: Results of Engine RPM vs Fuel Flow

Page 5-6- Activity 4: Axial Momentum Theory

Page 7-8 - Activity 5: Propeller Efficiency & Power Coefficient

Page 8-9- Activity 6: Fuel Flow

Page 9 - Activity 7: Conclusion

Page 10- Reference

Introduction

The function of a propeller on an aircraft is to provide propulsive force. This lab report was aimed at studying and analysing the propeller and some engine properties of a Cessna 310R. The axial momentum theory, advance ratio and the energy method for fuel …show more content…

The pressure field changes across the disk and the free stream velocity is continuous through the propeller disk.
The following equation states that the propeller thrust is equal to the rate of change of axial momentum at the disk.
T=A(p2-p1)

[pic]

With reference to the above diagram, bernoulli equation can also be applied between sections 0-1 upstream and 2-3 downstream of the propeller.

Advance Ratio

The advance ratio is a measure of the advancement of the propeller in one revolution, measured in a number of diameters. The advance ratio is also a scaling parameter,
Indicating that all the propellers with the same J, and geometrically similar, have the same performance index. The table below shows aircraft speed range for a range of practical advance ratios.

Advance Ratio (J) = U / (rpm x d)

Where; J- Advance ratio

U- Speed

d- Diameter of the propeller

|J (ADVANCE RATIO) |U (m/s) when RPM |U (m/s) when RPM |U (m/s) when RPM |
| |equals 1000 |equals 1000 |equals 1000 |
|0.2 |6.43 |9.65 |12.87 |
|0.4 |12.87 |19.3 |25.73 |
|0.6 |19.3 |28.95 |38.6 |
|0.8 |25.74 |38.6

Get Access