Class4_forces_on_plane_surfaces

Class4_forces_on_plane_surfaces - 4 Forces on Plane...

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S330, Section 2 Schlieren Image of Flow from a space heater Dr. Gary Settles, Penn State University PSU Gas Dynamics Lab 9/2/2010 1 ES330, Section 2 Dr. Douglas Bohl 239 Camp x6683, dbohl@clarkson.edu www.clarkson.edu/~dbohl/es330
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Schliering Videos High speed video of shock wave propagation in the upper fuselage of an aircraft. 9/2/2010 2 High speed video of shock wave propagation in the lower fuselage of an aircraft. http://www.mne.psu.edu/psgdl/Researchwebpage.html
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Outline • Forces on Plane Surfaces • Learning Objective: Be able to determine e force and its location on a plane 9/2/2010 3 the force and its location on a plane submerged surface. • Announcement: HW#2 will be posted today.
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Forces on Plane Submerged Objects On a plane surface hydrostatic forces are parallel and normal to the surface We need to find both the magnitude and location of the applied force In many cases we can use gage pressure 9/2/2010
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Unformatted text preview: 4 Forces on Plane Submerged Objects 9/2/2010 5 9/2/2010 6 Where does the force act? The moment of the resultant force must be equal to the moment of the distributed force 9/2/2010 7 Second moment of areas for shapes are given in handbooks but they are given about the centroid so we need to re-express in terms of the centroid using the parallel axis theorem. 9/2/2010 8 Example Gate is 5ft wide, rectangular cross section Back of gate is open to atmosphere Find F r Force of wall on gate Resultant force on hinge 9/2/2010 9 15 ft g=64 lbf/ft 3 10 ft 6 ft P 9/2/2010 10 9/2/2010 11 Example A rectangular gate is 1.8m wide and 2.0m long. Neglecting the friction in the hinge find the weight of the gate required to keep the gate close if the water reaches 2.0 m above the hinge. 9/2/2010 12 water 2m 2.0m 4 3 hinge 9/2/2010 13 9/2/2010 14 9/2/2010 15...
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This note was uploaded on 09/30/2010 for the course FLUIDS ES 340 taught by Professor Bohl during the Fall '10 term at Clarkson University .

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Class4_forces_on_plane_surfaces - 4 Forces on Plane...

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