Engineering, 31.03.2020 01:01, sydthekid25

An aircraft instrument nacelle with characteristic length L1 = 0.15 m experiences air flow at T[infinity] = 35°C and V1 = 100 m/s. When the surface temperature is Ts, 1 = 300°C, the total heat transfer rate from the object is found to be q1 = 1500 W. Estimate the rate of heat transfer rate from a second larger object that has the same shape but a characteristic length L2 = 0.3 m if the surface temperature is now Ts, 2 = 400°C in an airflow with T[infinity] = 35°C and V2 = 50 m/s. Hint: What’s the dependence of surface area on characteristic length, e. g. for a sphere.

Answers: 1

Show answers

Other questions on the subject: Engineering

Engineering, 04.07.2019 18:10, danksans7011

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

Answers: 1

continue

Engineering, 04.07.2019 18:10, krystabrewer3

What are the two (02) benefits, which may result from a successful implementation of preventive maintenance (pm) program in an organization? (clo3)a)- lean manufacturing b)-overlapping responsibilities c)-the planner is not qualified d)-accurate contractor information e)-reduction in equipment redundancies f)-accurate stores information

Answers: 3

continue

Engineering, 04.07.2019 18:20, xcapo1x

Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.

Answers: 2

continue

Engineering, 04.07.2019 19:10, gabrielaperezcz

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?

Answers: 3

continue

Do you know the correct answer?

An aircraft instrument nacelle with characteristic length L1 = 0.15 m experiences air flow at T[infi...