What is compressor blade loading and its effects on a compressor blade?

  • Thread starter Syed Moez
  • Start date
  • Tags
    Compressor
In summary, compressor blade loading refers to the stress and forces experienced by the blades of a gas turbine. These blades are designed with a curved root to withstand the high centrifugal forces near the hub. Anisotropic metal alloys are being developed to improve the durability of these blades. From an aerodynamic perspective, blade loading can also refer to the difference in pressure between the front and back of the blade. Further research and references can be found through a search for "anisotropic gas turbine blade loading."
  • #1
Syed Moez
2
0
I want to know what is compressor blade loading. When it is said that a compressor blade will be overloaded near the hub, what does it means?
 
Engineering news on Phys.org
  • #2
The tensile, radial stress in the blade due to the centrifugal force is greatest at the hub.
 
  • #3
Some blades have a curved root to provide greater area there.

Are you designing them?
 
  • #4
What does it means from an aerodynamic point of view? Does it means that the tangential velocity is higher at that particular region. I just want to know what is the definition of the term blade loading. If anyone can give me a link to some reference paper that would be great,
 
  • #5
I guess you're speaking of gas turbine blades?

Out of my field.
In 1970's I used to drink beer with a guy who designed such blades. So your query struck my curiosity.
He was entranced by a lamp i'd made from a big old steam turbine blade and especially its curved root.
He explained to me that is where they have most trouble because the immense centrifugal force produces so much tension. They were working on developing anisotropic metal alloys for the application.
Several of his colleagues stopped by to see my old yard long turbine blade lamp.

So i tried a search on "anisotropic gas turbine blade loading" for you
and google offered me scholarly links that look way over my head.
I feel like an ant trying to help a lion, but here goes anyway...
hopefully one of them helps you... even if just by suggesting search terms

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20000004184.pdf

http://www.researchgate.net/publication/24373015_Cyclic_structural_analyses_of_anisotropic_turbine_blades_for_reusable_space_propulsion_systems

https://books.google.com/books?id=4...e&q=anisotropic turbine blade loading&f=false

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20000004184.pdf

http://www.uni-magdeburg.de/ifme/l-festigkeit/pdf/1/qi-an-fe.pdf

good luck,

old jim
 
Last edited by a moderator:
  • #6
There is also a bending stress (always foreword) due to the pressure behind the blade being higher than the pressure in front of it, this force is greatest at the root of the blade.
 

1. What is compressor blade loading?

Compressor blade loading is the amount of aerodynamic force experienced by the blades of a compressor in a gas turbine engine. It is a measure of the load or stress on the blades due to the gas flow through the compressor.

2. Why is compressor blade loading important?

Compressor blade loading is important because it directly affects the performance and efficiency of a gas turbine engine. Higher blade loading can lead to increased thrust and power output, but it can also cause higher levels of stress and potential damage to the blades.

3. What factors affect compressor blade loading?

The main factors that affect compressor blade loading are the design and geometry of the blades, the speed and pressure of the gas flow, and the operating conditions of the engine. The type of compressor and the materials used in the blades can also have an impact on blade loading.

4. How is compressor blade loading calculated?

Compressor blade loading is typically calculated using a combination of theoretical calculations and experimental data. The most common method is to use the Euler's turbomachinery equation, which takes into account the gas flow velocity, mass flow rate, and blade geometry.

5. How can compressor blade loading be controlled?

Compressor blade loading can be controlled through proper design and optimization of the blade geometry, as well as by adjusting the operating conditions of the engine. In some cases, active control systems may also be used to regulate blade loading and prevent excessive stress on the blades.

Similar threads

Measuring the total pressure of a centrifugal compressor
    • Mechanical Engineering
Replies
1
Views
1K
Calculating parameters of centrifugal compressor
    • Mechanical Engineering
Replies
20
Views
777
Confusion about energy conversion mechanisms in gas turbines
    • Mechanical Engineering
Replies
8
Views
1K
Propeller - Rearward flow of air
    • Mechanical Engineering
Replies
26
Views
2K
Small question regarding a motor-compressor gearbox
    • Mechanical Engineering
Replies
7
Views
2K
Blade containment - simplified analytical approach
    • Mechanical Engineering
Replies
4
Views
934
Designing an Actual Vapor-Compression Refrigeration Cycle
    • Mechanical Engineering
Replies
8
Views
2K
Centrifugal Compressor: Absolute Velocity Calculation
    • Aerospace Engineering
Replies
5
Views
544
Find RPM of a fan by recording a video
    • Mechanical Engineering
Replies
33
Views
2K
What secondary circuit breaker should I use for my fridge compressor?
    • Electrical Engineering
Replies
8
Views
842

Hot Threads

Recent Insights

Back
Top