Q4: a) Determine the valve lift & valve dimensions of an engine from the following data: Bore 140 mm; Stroke = 270 mm; Power = 8.25 kW; Speed = 475 r.p.m.; Maximum gas pressure = 3.5 N/mm²; the mean velocity of the gas through the port (VP) is 40 m/s. The safe stress in bending for the valve material is 56 MPa. The valve is made of steel for which k = 0.42. The angle at which the valve disc seat is tapered is 45°. Take the permissible bending stress =56MPa. Any other data required for the design may be assumed

Calculate the viscosity of a fluid that would allow a pressure drop of 35 kPa over a 5 m length of 0.75-in. stainless steel sanitary pipe if the fluid is flowing at 0.12 m3/h and has a density of 1010 kg/m3. Assume laminar flow.

An axial member consisting of two plates each with a width of wa = 390 mm and a thickness of ta = 12 mm is carrying an axial force of P = 22 kN. The axial member is connected to a column by two bolts (diameter of d= 10 mm) three gusset plates with a width of wg = 280 mm and a thickness of tg = 6 mm. What is the average shear stress in the bolts? What is the maximum bearing stress in the connection? In MPa What is the critical normal stress in the axial member?

Suppose that in a coating process a solid sheet immersed in a liquid is pulled steadily at velocity U through a slot in a die, as shown in the figure. The die dimensions are such that there is a liquid gap of thickness H on each side of the sheet. Far downstream from the die the coating has a final thickness H... The pressure in the upstream liquid is ambient (P = Po) and gravitational and surface tension effects are negligible. The die length is L and the system width is W. The liquid is Newtonian and Re is such that the flow is laminar. Liquid P = Po X Die Liquid Solid Sheet Liquid Die H Gas P = Po Width = W Hoo U (a) Assuming fully developed flow, determine vx(y) for the liquid in the upper gap. Be sure to use the coordinates shown. (b) Determine the force required to pull the sheet through the die. You may assume that the shear force on the sheet in the upstream liquid (x < 0) is negligible. (c) Assuming that H is given, determine H...

3. What factors should we take into account for the selection of the pipe size and design of the piping system to conduct compressed air in industrial plants?4. What is a fluidized bed?

please help me with these.

Answer 7.13 please!

3. Consider the nozzle shown below. Water flows af 15 ft³/sec and discharges to the atmosphere. D1 = 12 in and D2 = 8 in. What is the stress on the bolts? D₂

7.11.* A nozzle is bolted onto a pipe by the flanged joint shown in Fig. 7.29. The flowing fluid is water. The cross- sectional area perpendicular to the flow at point 1 is 12 in² and at point 2 is 3 in². At point 2 the flow is open to the atmosphere. The pressure at point 1 ≈ 40 psig. (a) Estimate the velocity and mass flow rate by B.E. (b) What is the force tending to tear the nozzle off the pipe? Water Pipe #O FIGURE 7.29 Nozzle, bolted to pipe. Nozzle

A Newtonian fluid with a density of 60 lbm/ft³, viscosity of 0.206x10³ lbm/ft•s, and kinematic viscosity of 0.343x10-$ ft?/s undergoes steady shear between a horizontal fixed lower plate (y = 0) and a moving horizontal upper plate (y = 0.03 in). The upper plate is moving in the positive x-direction with a velocity of 3 ft/s, and the area of the upper plate in contact with the fluid is 0.1 ft?. Assume isothermal, incompressible flow. (a) Determine the shear stress exerted on the fluid under these conditions. (b) Calculate the force of the upper plate on the fluid.