Gas Turbine Health State Determination: Methodology Approach and Field Application

<table>Normalized values of compressor outlet pressure (<svg height="18.112499" id="M97" style="vertical-align:-3.50804pt" version="1.1" viewbox="0 0 24.15 18.112499" width="24.15" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,13.688)"><use xlink:href="#x1D45D"></use></g>
<g transform="matrix(.012,-0,0,-.012,10.138,17.762)"><use xlink:href="#x32"></use></g><g transform="matrix(.012,-0,0,-.012,16.475,5.525)"><path d="M471 153q-22 -15 -61 -13q-25 31 -45.5 49.5t-56.5 41.5q4 -71 28 -134q-17 -33 -42 -46q-24 12 -42 46q24 63 28 134q-36 -23 -56.5 -41.5t-45.5 -49.5q-36 -2 -61 13q0 28 19 59q65 10 130 43q-65 33 -130 43q-19 31 -19 59q22 15 61 13q25 -31 45.5 -49.5t56.5 -41.5
q-4 71 -28 134q17 33 42 46q24 -12 42 -46q-24 -63 -28 -134q36 23 56.5 41.5t45.5 49.5q36 2 61 -13q0 -28 -19 -59q-65 -10 -130 -43q65 -33 130 -43q19 -31 19 -59z" id="x2217"></path></g>
</svg>), compressor outlet temperature (<svg height="17.825001" id="M98" style="vertical-align:-3.276pt" version="1.1" viewbox="0 0 25.387501 17.825001" width="25.387501" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,13.688)"><use xlink:href="#x1D447"></use></g>
<g transform="matrix(.012,-0,0,-.012,11.388,17.763)"><use xlink:href="#x32"></use></g><g transform="matrix(.012,-0,0,-.012,17.712,5.525)"><use xlink:href="#x2217"></use></g>
</svg>) and power turbine outlet temperature (<svg height="17.9625" id="M99" style="vertical-align:-3.39066pt" version="1.1" viewbox="0 0 25.387501 17.9625" width="25.387501" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,13.688)"><use xlink:href="#x1D447"></use></g>
<g transform="matrix(.012,-0,0,-.012,11.388,17.763)"><use xlink:href="#x36"></use></g><g transform="matrix(.012,-0,0,-.012,17.712,5.525)"><use xlink:href="#x2217"></use></g>
</svg>) versus time.</table>

International Journal of Rotating Machinery

fig4

Figure 4

Figure 4: Gas Turbine Health State Determination: Methodology Approach and Field Application 