Numerical and experimental investigation of methane-oxygen detonation in a 9 m long tube

Piotr Lesiak , Konrad Malik , Mateusz Żbikowski , Andrzej Teodorczyk

Abstract

Numerical investigation of methane-oxygen detonatio n parameters was conducted with an OpenFoam code. Custom solver ddtFoam made especially for detonation problems was made use of. It uses the HLLC scheme to resolve the discontinuities and the subgridscale model to improve results on coarse meshes. Combustion model is based on progress variable equation which contains two source terms. The first is the deflagrative source term and is modelled using the Weller correlation. The second is the detonative source term and it accounts for autoignition effects. Range of analyzed gaseous mixture composit ions was 20, 33 and 40% of methane in oxygen. The 2D calculation geometry was a 9 m long pipe with diame ter 0.17 m. The mesh consisted of 382 500 hexahedral cells with the dimensions of 2x2 mm. Experimental results such as pressure profiles and detonation velocities are presented. Simulations were performed using LES turbulence model (k-equation-eddy-viscosity model) and compared with experimental data. Various dynamic parameters, like for example reaction lengths for methane-oxygen detonations, are estimated from the steady ZND analyses conducted in Cantera and SDToolbox libraries and based on GRI 3.0 kinetic mechanism of methane combustion. These leng ths were then used in empirical formulas to obtain the characteristic cell sizes and assessed against experimental data
Author Piotr Lesiak
Piotr Lesiak,,
-
, Konrad Malik
Konrad Malik,,
-
, Mateusz Żbikowski ITC
Mateusz Żbikowski,,
- The Institute of Heat Engineering
, Andrzej Teodorczyk ITC
Andrzej Teodorczyk,,
- The Institute of Heat Engineering
Journal seriesJournal of KONES, ISSN 1231-4005, e-ISSN 2354-0133
Issue year2016
Vol23
No4
Pages311-318
Publication size in sheets0.5
Keywords in Polishdetonation, numerical simulations, methane
Keywords in English detonation, methane, combustion, simulation, exper iments, characteristic cell size
Abstract in PolishBadania numeryczne mieszaniny metanu i powietrza zostały przeprowadzone z wykorzystaniem programu OpenFoam. Wykorzystano solver ddtFoam. Symulacje detonacji zostały wykonane kanale o długości 9 m i średnicy 0.17 m. Wyniki obliczeń zostały porównane z danymi eksperymentalnymi
DOIDOI:10.5604/12314005.1217241
URL http://journals.indexcopernicus.com/issue.php?id=24780270&id_issue=885105
Languageen angielski
Score (nominal)14
ScoreMinisterial score = 14.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 14.0, 28-11-2017, ArticleFromJournal
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