Corrosion of Turbines in Tanks

In summary, Jet Engines used in tanks moving in deserts face the issue of sand entering the turbines and causing erosion. To prevent this, possible solutions are coatings on the blades or a particle separator in the intake system. Coatings are expensive and cannot be applied in the field, while particle separators require periodic maintenance. Another option is to use a combination of static and dynamic filters, but this may add mass to the aircraft.
  • #1
jai6638
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Hello. I'm a HS junior at a research summer program and am researching Jet Engines. Apparently, when Jet Engines are used in tanks which move in deserts , the sand enters the turbines and corrodes them. In order to prevent that, would the solution be to implement a closed system so there is no contamination from the sand. One would need to figure out how to introduce new oxygen into the turbine for combustion..

Can you guys think of any other ideas?

Thanks

P.S: Filters would mean cleaning the filters sporadically and thus not making it the best solution..
 
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  • #2
The turbines don't corrode, they erode. Erosion is caused by the sand and attacks the leading edges of, mostly, the first few stages of compression. There are basically two options to look at:

- Coatings applied to the blades in an effort to slow down the erosion process.
- A particle seperator on the intake system.

From personal experience in helicopters and the first gulf war, we had a tough time with sand injestion. You can not stop it, unless you want to bring along a supply of your own supply air. Coating of blades is a very time consuming and costly endeavor that can not be done in the field. However, we did use particle seperators. They are not the same as filters, however they did require periodic maintenance (as if there is anything that doesn't). Here are a couple of links showing our engine, an Avco-Lycoming T-55 with and without the particle seperators (EAPS):

With: http://www.chinook-helicopter.com/chinook/images/eaps1.jpg
Without: http://www.chinook-helicopter.com/history/aircraft/D_Models/92-00309/92-00309_a.jpg
 
  • #3
Turbochargers of turbocharged diesel engines have the same problem in sandy climates. Basically one can use static filters with progressive finer mesh, but these have to be removed and cleaned, and may not be practical in aircraft which have high volumetric flow rates.

Also one can use dynamic filters, which are fine for diesel locomotives, but add mass, so may not be practical for aircraft. On the other hand, they may be practical in tanks. Perhaps a combination of static and dynamic filters is feasible.
 

1. What causes corrosion in turbines inside tanks?

Corrosion in turbines inside tanks is primarily caused by the presence of water and oxygen. The combination of these two elements, along with the presence of impurities in the water, can lead to the formation of rust and other corrosive compounds on the turbine's metal surfaces.

2. How does corrosion affect the performance of turbines?

Corrosion can significantly decrease the performance and efficiency of turbines by causing wear and tear on the metal components. It can also lead to pitting and erosion, which can affect the balance and alignment of the turbine, resulting in reduced power output and potential mechanical failures.

3. Can corrosion in turbines be prevented?

Yes, corrosion in turbines can be prevented through proper maintenance and regular inspection. This includes the use of corrosion-resistant materials, protective coatings, and the implementation of corrosion prevention strategies such as monitoring and controlling the water chemistry in the tank.

4. What are the consequences of ignoring corrosion in turbines?

Ignoring corrosion in turbines can have serious consequences, including reduced efficiency and power output, increased maintenance and repair costs, and even potential safety hazards. In extreme cases, corrosion can lead to catastrophic failures that can result in downtime, production losses, and environmental damage.

5. How can corrosion in turbines be detected and monitored?

Corrosion in turbines can be detected and monitored through various methods such as visual inspection, non-destructive testing techniques, and online monitoring systems. It is important to regularly monitor and assess the condition of the turbines to identify any signs of corrosion and take necessary preventative measures.

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