ME 475/675 Introduction to Combustion Lecture 30 Ex. 8.2, Flame speed and thickness calculations dependence on temperature and pressure

Announcements HW 13 Due Monday, November 9, 2015 Midterm 2 Friday, November 13, 2015 Review Monday, Nov. 9, 2015 PE 104, 8 to 9:30 (or 9:45?) AM Project In groups of two, construct a backpacking stove Materials will be supplied in lab Determine how long it takes and how much fuel is required to boil water Form your group by Monday, November 9 Inform TA: Hasibul Alam

Broader Impact Assignment Two choices, Both due Friday, November 6, 2015 Two paragraph summaries Seminar: Used Nuclear Fuel: Storage, Transportation, and Disposal – Technical, Political and Other Issues John Wagner, Director, Reactor & Nuclear Systems Division, Oak Ridge National Laboratory November 2, 2015 Hosted by UNR American Nuclear Society’s Student Chapter President: Kodi Summers Or Article: Dependence of Fire Time of Concern on Location of a One-assembly Transport PackagesDependence of Fire Time of Concern on Location of a One-assembly Transport Packages Are you having problems downloading this article?

Premixed Flame Laminar Speed, S L, and Thickness, 

Example 8.2 (turn in next time for extra credit) Estimate the laminar flame speed of a stoichiometric propane-air mixture using the simplified theory results (Eqn. 8.20). Use the global one-step reaction mechanism (Eqn. 5.2, Table 5.1, pp ) to estimate the mean reaction rate. Find: ___?

Detailed Analysis Heat and Radical

Stoichiometric CH 4 /air Flame

Pressure and temperature dependence of S L and (from approximate solution)

End 2015

For hydrocarbon fuels N~2

Methane CH 4 flame speed data

Methane Flame thickness (N ~ 2)