Projekt

Measurement of erosion resistance of turbine blade coatings using a provoked water jet method

Udbyder

Vejleder

Sted

København og omegn

Background:

Early studies on raindrop erosion of the material and coating of aviation objects were launched with the invention of rocket-powered aircrafts and missiles around the WWII. Raindrop impacts impose a high magnitude force on the target that can damage the surface or dislodge the bulk material. Set-ups to simulate the raindrop impact on such vehicles are therefore focused on very high-speed liquid-solid impacts.

Another field where raindrop impact has received a lot of attention in recent years is the wind turbine industry. To make energy production more efficient the wind turbines and their rotor diameter are getting bigger. Presently the largest rotor diameter is 170 m with 8 MW capacity. Rotor diameters of 250 m with 20 MW capacity are anticipated. Maximum tip speed of the present wind turbine blades is 100 m/s, which might be higher for larger wind turbines.

Composite wind turbine blades are designed to last for about 20-25 years in the field. However, the composite materials are susceptible to heat, moisture, UV radiation, and especially erosion from both solid particles and rain. If repairs are not done at the early stages, damage to the underlying laminate will be present as early as after five years. The break down mechanisms are not fully understood, however apart from the protecting materials ability to withstand a single impact also the relation between the raindrop impact period and the relaxation time is important.

The industrial standard to investigate simulated impact from raindrops is the so-called whirling arm erosion test rig or rain erosion test (RET). In this set-up, the raindrops are colliding with the painted sample mounted on a rotating arm. One attempt to make this test method simpler is the principle based on a provoked water jet driven by a high-pressure pump.

 

Purpose of the project:

The purpose of this project is to develop and evaluate a new test method for assessment of the coatings against water impact erosion. Experiments are performed with this set-up to quantify the lifetime of the coating and to correlate it with the established RET method.

 

 

Tasks:

·         Literature study on coating water impact erosion and test methods

·         Investigate and report the standard protocols for performing the rain erosion tests

·         Correlation of the coatings erosion resistance results from the new set-up with RET results

·         Experimental determination of the coating life time

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Kontakt

Virksomhed/organisation

DTU Kemiteknik

Navn

Søren Kiil

Stilling

Lektor

Mail

SK@kt.dtu.dk

Vejleder-info

Kandidatuddannelsen i Kemisk og Biokemisk Teknologi

Vejleder

Søren Kiil

Medvejledere

Claus Erik Weinell, Kim Dam-Johansen, Seyednezamaddin Azizaddini

ECTS-point

30

Type

Kandidatspeciale

Kandidatuddannelsen i Konstruktion og Mekanik

Vejleder

Søren Kiil

Medvejledere

Claus Erik Weinell, Kim Dam-Johansen, Seyednezamaddin Azizaddini

ECTS-point

30

Type

Kandidatspeciale

Kandidatuddannelsen i Materiale- og Procesteknologi

Vejleder

Søren Kiil

Medvejledere

Claus Erik Weinell, Kim Dam-Johansen, Seyednezamaddin Azizaddini

ECTS-point

30

Type

Kandidatspeciale

Kandidatuddannelsen i Vindenergi

Vejleder

Søren Kiil

Medvejledere

Claus Erik Weinell, Kim Dam-Johansen, Seyednezamaddin Azizaddini

ECTS-point

30

Type

Kandidatspeciale

OM DTU

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Anker Engelunds Vej 1
Bygning 101A
2800 Kgs. Lyngby


45 25 25 25

dtu@dtu.dk

CVR-nr. 30 06 09 46

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