One Dimensional Analysis Program for Scramjet and Ramjet Flowpaths

dc.contributor.authorTran, Kathleenen
dc.contributor.committeechairO'Brien, Walter F. Jr.en
dc.contributor.committeememberPaul, Mark R.en
dc.contributor.committeememberSchetz, Joseph A.en
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2014-03-14T20:30:18Zen
dc.date.adate2011-02-03en
dc.date.available2014-03-14T20:30:18Zen
dc.date.issued2010-12-08en
dc.date.rdate2011-02-03en
dc.date.sdate2011-01-08en
dc.description.abstractOne-Dimensional modeling of dual mode scramjet and ramjet flowpaths is a useful tool for scramjet conceptual design and wind tunnel testing. In this thesis, modeling tools that enable detailed analysis of the flow physics within the combustor are developed as part of a new one-dimensional MATLAB-based model named VTMODEL. VTMODEL divides a ramjet or scramjet flow path into four major components: inlet, isolator, combustor, and nozzle. The inlet module provides two options for supersonic inlet one-dimensional calculations; a correlation from MIL Spec 5007D, and a kinetic energy efficiency correlation. The kinetic energy efficiency correlation also enables the user to account for inlet heat transfer using a total temperature term in the equation for pressure recovery. The isolator model also provides two options for calculating the pressure rise and the isolator shock train. The first model is a combined Fanno flow and oblique shock system. The second model is a rectangular shock train correlation. The combustor module has two options for the user in regards to combustion calculations. The first option is an equilibrium calculation with a "growing combustion sphere" combustion efficiency model, which can be used with any fuel. The second option is a non-equilibrium reduced-order hydrogen calculation which involves a mixing correlation based on Mach number and distance from the fuel injectors. This model is only usable for analysis of combustion with hydrogen fuel. Using the combustion reaction models, the combustor flow model calculates changes in Mach number and flow properties due to the combustion process and area change, using an influence coefficient method. This method also can take into account heat transfer, change in specific heat ratio, change in enthalpy, and other thermodynamic properties. The thesis provides a description of the flow models that were assembled to create VTMODEL. In calculated examples, flow predictions from VTMODEL were compared with experimental data obtained in the University of Virginia supersonic combustion wind tunnel, and with reported results from the scramjet models SSCREAM and RJPA. Results compared well with the experiment and models, and showed the capabilities provided by VTMODEL.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-01082011-100759en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-01082011-100759/en
dc.identifier.urihttp://hdl.handle.net/10919/30857en
dc.publisherVirginia Techen
dc.relation.haspartTran_KN_T_2010_Copyright.pdfen
dc.relation.haspartTran_KN_T_2010.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectHypersonic Propulsionen
dc.subjectOne Dimensional Modelingen
dc.subjectScramjetsen
dc.subjectDual-Mode Scramjetsen
dc.titleOne Dimensional Analysis Program for Scramjet and Ramjet Flowpathsen
dc.typeThesisen
thesis.degree.disciplineMechanical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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