Originally Posted by
Xray4277
Back in the 1980s I remember Avon gas turbines (in use for power generation offshore) being washed online with crushed nutshells or rice husks. But the industrial Avons were probably not treated as kindly as the aviation versions...
My recall: I have executed the crushed nut shell wash on aviation dart engines (centrifugal compressor) using a hopper and chute directed into the top of the intake whilst the engine at idle; this was considered a last resort to improve performance TGT!
On aviation axial compressor engines, like RR Spey and mixed compressor P&W PT6, I have only done the demineralised water (but sometimes + a chemical) wash.
With the phasing out of demin water injection types ( partly due noise rulings) the airport stopped storing the water and it became a pain to get from local refineries; we bought a filtration plant, but it was not practical, the local water was both high in salt and chlorine content, both harmful to the engine metals.