MET308 Practice for Quiz 3

MET308 Practice for Quiz 3

Turbulent vs Laminar

The classification of the flow as turbulent or laminar depends on the Reynolds number.

Multiple Choice

You can use an easy formula like f=64/Re to find the friction factor if the flow is what type?

• Laminar

• Turbulent

Multiple Select

Which of the following do we use to find the friction factor if the flow is turbulent? Check all that apply.

• 64/Re

• Colebrook equation or simplified approximation

• Read it off a chart

• Assume it's 1

Darcy friction factor f

• We need this to determine the pump's power requirements to keep the flow going

• Recall that we need the pressure drop to find out how much power the pump needs

Multiple Choice

Power is work divided by what?

• Area

• Time

• Force

• Efficiency

Power

We determine the power a pump needs based on the pressure losses.

Multiple Choice

What is the critical Reynolds number?

• $2\cdot10^5$

• $5\cdot10^5$

• $3\cdot10^6$

• It depends

Open Ended

How does having flaps on an airplane change its aerodynamics?