No of blade sets in reaction turbines

In summary, having multiple sets of blades in reaction turbines allows for efficient extraction of energy per stage. The design process involves finding the right blade shape and geometry after determining the stage parameters and angles. Having just one set of wider blades may decrease the effective area and lead to undesired choked conditions.
  • #1
chhitiz
221
0
why do we need to have many sets of blades to utilize the gas pressure in reaction turbines properly? why not have just a set of comparatively wider blades?
 
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  • #2
I assume by sets you're talking about stages. When it comes to stages, it all comes down to how much energy we can efficiently extract per stage. If we can get it all, then we'll just have one vane and one blade.

The preliminary turbine design is done without knowledge of blade shape or count. After the stage parameters and blade/gas angles are calculated, then we go back and try to find a shape and geometry.

Note that depending on your definition of "width" you could be decreasing the effective area through the turbine and reach a possibly unwanted choked condition.
 

1. How does the number of blade sets affect the performance of a reaction turbine?

The number of blade sets in a reaction turbine is directly related to its overall efficiency. Generally, more blade sets mean better performance, as they provide more surface area for the fluid to interact with and extract energy from. However, there is a point of diminishing returns, where adding more blade sets may not significantly increase performance.

2. What is the ideal number of blade sets for a reaction turbine?

The ideal number of blade sets for a reaction turbine depends on various factors such as the type of fluid, operating conditions, and desired performance. Generally, a higher number of blade sets can lead to better performance, but it is important to consider other factors such as cost and practicality.

3. Can the number of blade sets be changed in a reaction turbine?

Yes, the number of blade sets can be changed in a reaction turbine. However, it is not a simple process and requires redesigning and manufacturing of the turbine. It is important to carefully consider the impact on performance and cost before making any changes to the number of blade sets in a reaction turbine.

4. How does the number of blade sets affect the maintenance of a reaction turbine?

The number of blade sets can affect the maintenance of a reaction turbine in various ways. Generally, more blade sets mean more parts to maintain and potential points of failure. However, a higher number of blade sets may also result in a more robust and reliable turbine. It is important to consider the specific design and operating conditions when evaluating the maintenance requirements of a turbine.

5. Are there any disadvantages to having a higher number of blade sets in a reaction turbine?

While a higher number of blade sets can lead to better performance, there are some potential disadvantages to consider. These include increased cost and complexity of manufacturing, potential for blade interference and loss of efficiency, and increased maintenance requirements. Careful consideration should be given to the specific application and design before deciding on the number of blade sets for a reaction turbine.

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