student_handout_lab3

student_handout_lab3 - AIR VELOCITY AND MASS FLOW MAE 306...

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AIR VELOCITY AND MASS FLOW MAE 306 Page 1 of 3 Objective: The objective of the experiment is to make a survey of airflow in a pipe. Characteristics such as mass flow rate, mean velocity, Reynolds number, and Mach number will be calculated. A Pitot-static tube is used to measure the differential pressure and a linear digital read out (DRO) is used to locate the position of the pitot-static tube in the pipe. Experiment: Consider the airflow in a given pipe as shown in figure 1. (An example calculation for this experiment is given in chapter 10 of the text, example 10.14.) o r o Figure 1: Pipe cross section. 1. Measure room temperature and pressure using the barometer mounted on the wall in BR1216. Calculate the density of air from equation room room RT p = ρ ( 1 ) 2. Measure the differential pressures from the pipe wall to the center of the pipe with a Pitot- static tube. Plot differential pressure vs. distance. 3. Calculate the flow velocity from 2 2 1 V p = Δ . ( 2 ) 4. Plot Vr vs. r , then calculate the area under this curve. Calculate the mass flow rate from equation ∫∫ = = = A rr oo Vrdr rdr V VdA m 00 2 )
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This note was uploaded on 05/05/2010 for the course MAE 306 taught by Professor Gilbert during the Spring '08 term at N.C. State.

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student_handout_lab3 - AIR VELOCITY AND MASS FLOW MAE 306...

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