Industry_Day_-_Morning_Presentation.pdf

I n t e g r i t y - S e r v i c e - E x c e l l e n c e

Industry Day 16T Compressor C1 Blades

21st October 2016

Arnold Engineering Development Complex

DISTRIBUTION A: FOR PUBLIC RELEASE

FOR OFFICIAL USE ONLY

16T Background

• Built in mid 1950s

• Test section is 16-ft x16-ft x40ft

• Total number of blades 97

• 31 – A Row, 33 – B-Row, 33 – C-Row

• Mach range 0.6 to 1.6

• Compressor operating speed 60 to 600 rpm

• Operating pressure 0 to 4200psfa

• 331000 hp (247 MW) drive train input power

• Max temperature 320 to 360 F

Blade Overview

• Blades are ~7-ft long

• Material

– 7781 E-glass

– Resin for repairs wet layup

TL1188A and FH 13508. Pre-preg Cycom 7668

• Steel strong back and bushing

• Weight = ~115 lbs

• Secondarily bonded cuff and tip-cap

• Designed in 1965

Cuff

Blade Sections, Root Section

Fiberglass blade skin and spar box construction near root section

Blade Adaptor on Rotor Disc

Max Stress Area

Blade with Cuff in Compressor

Fiberglass blade with cuff installed in the compressor. The blade swing is limited by the spacer mounted to each side of the blade.

Major Blade Areas of Concern

• Inspectability

• Repairability

• Damage tolerance

• Performance

• Life span

16T C1 Rotor Blade Foreign Object Damage

Causes

• Commonly the damages are caused by parts that liberate from the test article

– i.e nuts, washers, screws..

• Sometimes Wild life

Washer 4” O.D. x 1” Thick

Washer

Caused by a heavy duty washer

Damage from nut

Damage from previously shown nut

Damage from previously shown nut

Damage from a screw

Bird Strike blood

Fiberglass laminate failure

Caused by a bird strike

Caused by a bird strike

Questions