高等流体力学bernoulli_practiceproblems
17页1、Practice Problems on Bernoullis Equation C. Wassgren, Purdue University Page 1 of 17 Last Updated: 2010 Sep 15 bernoulli_01 A person holds their hand out of a car window while driving through still air at a speed of Vcar. What is the maximum pressure on the persons hand? Answer(s): 210maxcar2pppV Vcar Practice Problems on Bernoullis Equation C. Wassgren, Purdue University Page 2 of 17 Last Updated: 2010 Sep 15 bernoulli_02 Water is siphoned from a large tank through a constant diameter hose as s
2、hown in the figure. Determine the maximum height of the hill, Hhill, over which the water can be siphoned without cavitation occurring. Assume that the vapor pressure of the water is pv, the height of the water free surface in the tank is Htank, and the vertical distance from the end of the hose to the base of the tank is Hend. Answer(s): atm hillendvppHHg Hend Htank Hhill discharges into atmosphere constant diameter pipe Practice Problems on Bernoullis Equation C. Wassgren, Purdue University Pa
3、ge 3 of 17 Last Updated: 2010 Sep 15 bernoulli_03 Air flows through the Venturi tube that discharges to the atmosphere as shown in the figure. If the flow rate is large enough, the pressure in the constriction will be low enough to draw the water up into the tube. Determine the flow rate, Q, needed to just draw the water into the tube. What is the pressure at section 1? Assume the air flow is frictionless. Answer(s): 21 H 0 22 21112QgHAAatmACppp discharges into the atmosphere Q A1 A1 A2 section
4、1 section 2 air water tank is open to the atmosphere H Practice Problems on Bernoullis Equation C. Wassgren, Purdue University Page 4 of 17 Last Updated: 2010 Sep 15 bernoulli_05 You are to design Quonset huts for a military base. The design wind speed is U = 30 m/s and the free-stream pressure and density are p = 101 kPa and = 1.2 kg/m3, respectively. The Quonset hut may be considered to be a closed (no leaks) semi-cylinder with a radius of R = 5 m which is mounted on tie-down blocks as shown i
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