M16-5363 · Low Density Supersonic Decelerator (LDSD) Supersonic Flight Dynamics Test (SFDT) Plume Induced Environment Modelling

NASA (NTRS) · 2016

Open the PDFPublic domain · NASA (NTRS)Technical Reports

Overview

Provide plume induced heating (radiation & convection) predictions in support of the LDSD thermal design (pre-flight SFDT-1) Predict plume induced aerodynamics in support of flight dynamics, to achieve targeted freestream conditions to test supersonic deceleration technologies (post-flight SFDT-1,…

Pages: 1

Key points

The Low Density Supersonic Decelerator (LDSD) Supersonic Flight Dynamics Test (SFDT) aims to predict plume induced heating and aerodynamics for thermal design and flight dynamics.
The modeling approach includes using the RAMP engineering code for flow fields and the Loci/CHEM 3.3 CFD code for plume flow fields.
Plume radiation is analyzed using a Reverse Monte Carlo (RMC) radiation code.
Reynolds Averaged Navier-Stokes (RANS) simulations are employed with varying fidelity and grids.
The study incorporates two-phase flow involving gas and aluminum oxide particles, as well as two gaseous species for thermodynamic modeling.

Frequently asked questions

What is the purpose of the LDSD SFDT?

The purpose of the LDSD SFDT is to provide plume induced heating predictions and to predict plume induced aerodynamics to support the testing of supersonic deceleration technologies.

What modeling codes are used in the LDSD SFDT?

The modeling codes used include the RAMP engineering code for flow fields, Loci/CHEM 3.3 CFD code for plume flow fields, and a Reverse Monte Carlo (RMC) radiation code for plume radiation.

What types of simulations are conducted in the study?

The study conducts Reynolds Averaged Navier-Stokes (RANS) simulations and incorporates two-phase flow simulations involving gas and aluminum oxide particles.

What are the key components of the plume induced environment modeling?

Key components include predictions of plume induced heating, aerodynamics, and the analysis of plume radiation.

What is the significance of the two gaseous species in the modeling?

The two gaseous species are used for thermodynamic modeling, representing thermally perfect equivalent air and plume with frozen chemistry.

Document

LOW DENSITY SUPERSONIC DECELERATOR (LDSD)

SUPERSONIC FLIGHT DYNAMICS TEST (SFDT)

PLUME INDUCED ENVIRONMENT MODELLING

1 2 3 4 5

B. L. Mobley , S. D. Smith , J. W. Van Norman , S. Muppidi and I. Clark

Objectives:

LDSD SFDT 1, 2 Trajectories

POWERED ASCENT RELEASE FROM BALLOON VEHICLE SPIN - DOWN

• Provide p lume induced heating (radiation & convection) predictions in support of the

6.0 65

LDSD thermal design (pre - flight SFDT - 1)

5.0 60

• Predict plume induced aerodynamics in support of flight dynamics, to achieve targeted

freestream conditions to test supersonic deceleration technologies (post - flight SFDT - 1, 4.0 55

pre - flight SFDT - 2)

3.0 50 VEHICLE SPIN - UP Approach: Altitude (km) Mach Number

• Star48 and Small Solid Nozzle Flow Fields – RAMP engineering code

2.0 45

• Star48 and Small Solid Plume Flow Fields – Loci/CHEM 3.3 CFD code

• Plume Radiation – Reverse Monte Carlo (RMC) radiation c ode

SPIN - UP MOTORS 1.0 40 (2 PAIRS)

• Reynolds Averaged Navier - Stokes (RANS) Simulations (varying fidelity, grids)

SPIN - DOWN MOTORS (2 PAIRS)

• Two - phase Flow (Gas + Al O particles)

2 3 0.0 35 0 10 20 30 40 50 60 70 80

• Two Gaseous Species (thermally perfect, equivalent air and plume, frozen chemistry)

ORBITAL - ATK STAR48 Time (Seconds) (20% OFFLOADED TO REDUCE BURN TIME) Aerospace Engineer, EV33 Aerosciences Branch, Marshall Space Flight Center, Huntsville, Alabama, 35811 Senior Aerospace Engineer, Plumetech , Huntsville, Alabama, 35811 SFDT-1 Trajectory, Altitude (km) SFDT-2 Trajectory, Altitude (km) Senior Project Engineer , Analytical Mechanics Associates, Hampton, Virginia, 23666 Research Scientist, ERC, Mountain View, California, 94035 SFDT-1 Trajectory, Mach Number SFDT-2 Trajectory, Mach Number LDSD Principal Investigator, Jet Propulsion Laboratory, Pasadena, California, 91109