Purdue University - School of Mechanical Engineering

Combustor Cooling in Rocket EnginesB. Talbert (GRA), D. Li, C. Merkle

Sponsor: NASA Marshall Space Flight Center

Objectives: Develop Improved Heat Objectives: Develop Improved Heat Transfer Models for Rocket Engine Transfer Models for Rocket Engine

Combustors Combustors

Method: Use Detailed Computational Simulations that Include Conjugate Heat

Transfer, Regen Cooling, and Film Cooling

Temperature Distribution at Various Axial

Locations

Liquid Flim

Coolant

Copper Walls

Supercritical RegenCoolant

Reacting Gas

Zone ICooling Slots

Zone IIICopper Wall

Zone II Supercritical Coolant

Purdue University - School of Mechanical Engineering

Constant Volume Combustion Turbine SystemS. Swanand (GRA), G. Xia, C. Merkle

Sponsor: NASA Glenn Research Center

Objectives: Develop Constant Volume Objectives: Develop Constant Volume Hybrid Combustion System for Turbine Hybrid Combustion System for Turbine

Engine Application Engine Application

Method: Combine Pulsed Detonation Combustion with Unsteady Ejectors in

Cyclic Fashion by Computational Analysis

Unsteady Code Validation

1.54ms1.54ms 1.70ms1.70ms

Shadowgraph:

Experiment

Shadowgraph:

Computation

2-D Shadowgraph:

Computation

Streamlines:

Computation

Pressure

Temperature

PDE Tube

Purdue University - School of Mechanical Engineering

Temperature Temperature Distribution in Distribution in

Perfect Gas and Perfect Gas and Real Fluids Real Fluids

Ultra-High Pressure Fluid DynamicsH. Jung (GRA), D. Li, C. Merkle

Sponsor: Air Force Office of Scientific Research

Objectives: Analyze Effects of Fluid Objectives: Analyze Effects of Fluid Properties on Flows at UltraProperties on Flows at Ultra--High Pressures High Pressures

Method: Formulate Equations of Motion Formulate Equations of Motion for Arbitrary Equation of State Fluids for Arbitrary Equation of State Fluids

Address Flow Conditions in Proposed Address Flow Conditions in Proposed Hypersonic Test FacilityHypersonic Test Facility

Hypersonic Nozzle Shapes for Hypersonic Nozzle Shapes for Perfect Gas and Real Fluids Perfect Gas and Real Fluids

Conjugate Heat Transfer at Conjugate Heat Transfer at 2000 2000 MPaMPa: T and M Contours : T and M Contours

Purdue University - School of Mechanical Engineering

Liquid Rocket Engine Combustion Instability ModelingM. Ellis (GRA), G. Xia, V. Sankaran, C. MerkleSponsor: NASA Marshall Space Flight Center

Objectives: Understand Interactions Objectives: Understand Interactions Between Combustion and Pressure Between Combustion and Pressure

DisturbancesDisturbances

Method: Use Computational Simulations in Conjunction with Companion Experiments

Nozzle

Pressure Response to Partially Closing

Throat

Forced Longitudinal Oscillations

Inverted Nozzle

Standard Nozzle

Head End

Transverse Transverse Waves in Waves in

22--D D CombustorCombustor

Purdue University - School of Mechanical Engineering

MHD Generators for On-Board PowerR.Smith (GRA), D. Li, C. Merkle

Sponsor: Air Force Research LabElectrical Current Density

and Tangent VectorsObjectives: Develop Improved MHD Objectives: Develop Improved MHD Generators for Possible Aircraft Use Generators for Possible Aircraft Use

Method: Solve Coupled Fluid Mechanics / Solve Coupled Fluid Mechanics / Electromagnetic Equations to Understand Electromagnetic Equations to Understand Operation of MHD Generators and Work Operation of MHD Generators and Work in Close Collaboration with Experimentsin Close Collaboration with Experiments

Diverging Channel with Insulator Discs

Unstructured Hexahedral Grid for Supersonic

Plasma Channel

Fluid GridInsulator DiscsChannel WallsMagnetic FieldCut Away View

Purdue University - School of Mechanical Engineering

Unsteady Mixing ProcessesD Vyotovich R. Lucht, C. Merkle

Sponsor: NASA Marshall Space Flight Center

Objectives: Identify Key Physical Issues Objectives: Identify Key Physical Issues Involved in Unsteady Mixing of Two Involved in Unsteady Mixing of Two

Streams Streams

Method: Coupled Experimental / Coupled Experimental / Computational Study Involving Light and Computational Study Involving Light and

Heavy GasesHeavy Gases

Simulation

St = 2 and St = 15Experiment:

St = 2 and St =15