Q3. The fringe pattern shown in Fig. Q2 corresponds to a valve head in contact with the valve seat, under hydrostatic lo

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Q3 The Fringe Pattern Shown In Fig Q2 Corresponds To A Valve Head In Contact With The Valve Seat Under Hydrostatic Lo 1 (452.24 KiB) Viewed 38 times

Q3. The fringe pattern shown in Fig. Q2 corresponds to a valve head in contact with the valve seat, under hydrostatic load. It was obtained with an out-of-plane interferometer with normal illumination (i.e. 0 = 0, with the illumination and observation directions perpendicular to the plane of the figure) and using a pulsed ruby laser with a wavelength of 694.3 nm. a) Draw a polar diagram of the w displacement as a function of angular position (0<a <21) along the circumference of the valve next to the head contact (yellow line in Fig.Q2 (a)). Use units of micrometres in the w axis. Hint: consider that the zero-order fringe (N = 0) is the fringe that passes through the origin. [6 marks) b) Explain a potential cause of this deformation field. [2 marks] c) Explain a potential cause for the fringes on the valve seat. [2 marks] у Valve head X Valve seat (a) VALVE HEAD DE FORMATION MOVEMENT AT VALVE SEAT LOAD (b) Figure Q3. a) OOP fringes of valve head; b) head and seat configuration and load with hydrostatic pressure. The z-axis is the axis of the valve's shaft