{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Prelim_2_problem_1

# Prelim_2_problem_1 - Prelim 2 Problem 1 Given Hot...

This preview shows pages 1–2. Sign up to view the full content.

Prelim 2, Problem 1 Given: Hot combustion products flowing at 80 m/s enter a nozzle at 260 kPa and1050 K and leave at 10 kPa. Find: Exit velocity of the nozzle Assumptions: - model gas as air with constant specific heats - neglect change in potential energy T 1 = 1050K p 2 = 10kPa p 1 = 260kPa V 1 = 80m/s V 2 = ? m/s c p = 1.000kJ/kgK k = 1.4 R = 0.287kJ/kgK Analysis: First, apply energy conservation to control volkume, neglecting change in potential energy, ( ) 2 2 1 2 1 2 2 1 2 1 2 2 2 1 2 1 0 2 2 2 2 2 CV CV p V V m h m h Q W V V h h V c T T V = + + + = + = + ± ± ± ± 0 0 For isentropic process with constant specific heats,

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}