An adiabatic air compressor with inlet conditions of 100 kPa, 27 C and an exit pressure of 500 kPa has an inlet volume flow rate of 5 m3/s and operates in steady flow. Calculate the minimum power required to drive the compressor.

1. Genichi Taguchi defined the taguchi loss Function: Explain what the Taguchi Loss Function means for both the consumer and Manufacturer

2. Boothroyd Dewhurst Manual Assembly: What do alpha a beta define?

3. Draw a FAST diagram for a manual toothbrush.

4. Assuming you have your favorite coffee beans ground and you have a coffee type drip coffee maker. List the steps and draw a Process Flow Diagram for brewing a pot of coffee.

A steel cantilever member as shown below is subjected to a transverse load at its end that varies from 135 N to -45 N as axial load varies from 450 N to -110 N. Determine the required diameter at the change of section for infinite life using a factor of safety of 2. The strength properties of the material are:

Sut=550 MPa, Sy=470 MPa, Se(corrected)=275 MPa,

Test data indicate that the theoretical stress concentration factor for bending and axial loads are 1.44 and 1.63 respectively at the change of cross-section. All dimensions are in mm. Use Goodman failure locus. Assume notch sensitivity, q=1. Neglect transverse shear.

1.What are the distinctive features between a polyester and vinyl ester in terms of their properties.

2.List five (5) general characteristics of fiber re-enforced composites over their metal counterparts.

please no hand writing.

1)Write the one-dimensional heat diffusion equation with thermal generation per unit volume and constant properties, assuming unsteady heat transfer.

2)

Consider two identical pin fins, however one of the pin fins has a diameter which is 2X larger than the other. Comment on the effect this may or may not have in terms of efficiency and effectiveness.

Now consider two plate fins which are identical, however one is 2X thicker, How does this effect the efficient and effectiveness?

Write a Matlab Code for the following:

A co-op is paid a $15.00 hourly wage up to 20 hours per week. In addition, any hours over 20, the co-op collects an overtime wage that is 1.5 times greater, and any hours over 30, 2.0 times greater. Using an in-else statement, write a code that calculates the co-op’s gross paycheck for: a) 15 hours worked b) 28 hours worked c) 35 hours worked

5- What are differences in Brinell, Rockwell and Vicker hardness measurements? Write your answer in a tabular form based upon type of indenter(s) used, range of applied typical loads and type of material substrates where test is typically applicable and one example per material of application where test could be used.

Text Book- The Science and Engineering of Materials, Askeland et al. (seven edition)

Home Work- # 6 for Chapter 6

please yype your answer in the computer

thanks,

Air enters an air conditioning unit at 32oC, 80% relative humidity, and with a mass flowrate of 12 kg/min. It is to be conditioned to 25oC and 50% relative humidity. In order to do this, part of the moisture in the air must be removed as condensate at 30oC. Be able to draw the path that the atmospheric air takes on the psychrometric chart. Find

a. The rate of moisture removal from the air, mw 

b. The rate of heat removal from the air, in kW

c. The temperature to which the incoming humid air must be cooled to achieve the desired rate of condensation

What are the factors in determining your takeoff critical field length for a certain runway? If after doing initial calculations you find the runway is too short, what might you be able to do as the pilot in command to be legal for takeoff?

Compare and contrast the longitudinal stability of a conventional aircraft in two conditions: forward CG and aft CG? Discuss control forces and aircraft responses from trimmed condition if you pulled back on the stick and let it go.

Compare and contrast a supercritical wing with a laminar flow wing? Discuss modern aircraft that have utilized these wings. What are the enhancements and drawbacks?

Problem Statement (Good luck…): Using Saint-Venant’s Principal and its importance to the analysis of stress acting on a volume element within a body and finite element theory, why is it “technically” incorrect and unrealistic to apply a point load while running a finite element simulation?

Steam, initially at 700 lbf/in.², 550°F undergoes a polytropic process in a piston–cylinder assembly to a final pressure of 2200 lbf/in.² Kinetic and potential energy effects are negligible.

Determine the heat transfer, in Btu per lb of steam, for a polytropic exponent of 1.4,
(a) using data from the steam tables.
(b) assuming ideal gas behavior.

The volume of 1 kg of helium in a piston-cylinder device is initially 7 m3 . Now helium is compressed to 3 m3 while its pressure is maintained constant at 150 kPa. Determine the initial and final temperatures of helium as well as the work required to compress it, in kJ. You may assume deal gas behavior.

A compression spring has a diameter of 0.67 in and a coil diameter of 0.067 in, with 30 total coils.
The spring is to be made of unpeened HD A227 wire and have squared and ground ends. Find the
fatigue factor of safety when repeatedly cycled from 0 to 10.3 lbf. Use the Gerber fatigue criterion
and the Zimmerli data.

An insulated steel pipe carries hot water at 80 ºC. The outer surface of the insulation loses heat to the environment by convection and radiation. For convection, assume hconv = 5.8 W/m2.ºC. The emissivity of the insulation is 0.88 and conductivity, k = 0.038 W/mK. The surroundings are at 30 ºC. Assume the inner surface of the insulation is at the water temperature. What is the surface temperature of the insulation?

Consider the impact of compression of the air-fuel mixture on turbulence. Assume that an idealized turbulent eddy is represented by a gas disc 3 mm in diameter, d, and 0.5 mm thick, l, at atmospheric pressure and temperature. The disck is spinning around its axis at 1000 rpm. What is the rotational speed of the disk after it is adiabatically compressed to 25 atm pressure? The gas disc is compressed equally in both the radial and axial direction; that is d₁ / d₂ = l₁ / l₂. Discuss the results in terms of turbulence in engines.