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Aircraft Store Separation and Carriage Loads Analysis: STRLNCH

STRLNCH is a comprehensive 6-DOF store separation simulation software package applicable to high angle-of-attack launch from maneuvering aircraft at subsonic and supersonic speeds. Released store/missile aerodynamics are modeled by either the MISL3 or MISDL software.

STRLNCH runs fast on PCs (Windows & Linux). Reduces need for costly wind tunnel tests. Indispensable in preliminary safe store launch assessment and parent aircraft/store integration studies. Applicable to Monte Carlo simulations and statistical analysis of factors affecting safe separation.





Range of Flow Parameters
Subsonic through supersonic Mach numbers
Parent aircraft angles of attack/sideslip up to 60 degrees
Arbitrarily maneuvering aircraft
Nonzero rotational rates

Important Parent Aircraft Modeling Features
VTXCHN fuselage modeling for high angles of attack
Stall models for wing/pylon(s) at high angles of attack

Important Store and Release Modeling Features
See MISL3 and MISDL information
Effects of parent aircraft nonuniform flow
Noncircular store modeling with MISDL
Canard-tail vortical interference

Rail/tube launch option
Hook release and delay modeling
Ejection force models
Thrust time histories
Time dependent mass properties
User-specified autopilot
Umbilical chord/disconnect model
Lanyard disconect model
Wing-deployment model
Special modeling for wing-tip mounted missiles
Quantities Computed
Launched store 6-DOF trajectory characteristics: translational and rotational positions, velocities and accelerations
Overall 6-DOF forces and moments time histories:
CA, CY, CN, Cl, Cm, Cn
Fin forces and moments:  CAF, CNF, CHM, CBM
Detailed carriage load distributions on store body and fins

Output Files
Spreadsheet files of trajectory state variables, store loads, etc.
Flow field components velocities
Tecplot® compatible files for:
3-D animations of trajectories
2-D plots of the released store trajectory characteristics
Details of the parent aircraft induced flow field

Aircraft Models (partial list)
Aircraft: F-4, F-5, AV-8B, F-14, F-15, F-16, F/A-18, F-22,
B-52, CN-235, 737, 747, 767, L1011, DC-8, Draken, HU-25 Falcon, PC-21
Helicopter: SH-60B, SH-2G, OH-6
Various UAVs
Weapon Systems: MSST/RATO, MSST/Sprint


Effect of Spanwise Locaton on Fixed-Stick Descent of Aircraft into the Wake of a Leading Aircraft

Additional Applications to Launch Vehicles
Click Here for Examples of Launch Vehicle Separation Analysis Click Here for Examples of Launch Vehicle Separation Analysis

References
  1. Reisenthel, P. H., Lesieutre, D. J. and Quijano, O. E. "Statistical Analysis of Jettison Ejection Scenarios," AIAA-2015-1526, Jan. 2015.
  2. Lesieutre, D. J., Dillenius, M. F. E., and Gjestvang, J. A., "Store Separation Simulation of the Penguin Missile from Helicopters," Paper Number 9, Presented at NATO-RTO Symposium on Innovative Missile Systems, Amsterdam, The Netherlands, May 2006, RTO-MP-AVT-135.
  3. Lesieutre, D. J., Dillenius, M. F. E., and Gjestvang, J., "Store Separation Simulation of Penguin Missile from Helicopters," AIAA 2002-0278, Jan. 2002.
  4. Lesieutre, D. J., Dillenius, M. F. E., and Gjestvang, J., "Application of MISDL/KDA Aerodynamics Prediction Method to Penguin Missile," AIAA 2002-0277, Jan. 2002.
  5. Dillenius, M. F. E., Lesieutre, D. J., Perkins, S. C., Jr., and Love, J. F., "Prediction of Nonlinear Missile Aerodynamics with Applications Including Store Separation," RTO-MP-5, Missile Aerodynamics, Nov. 1998.
  6. Dillenius, M. F. E., Perkins, S. C., Jr., and Lesieutre, D. J., "Engineering Level Methods for Carriage Loads, High-Alpha Launch from Pitching Aircraft, and Submunition Aerodynamics," AGARD CP-570, Aerodynamics of Store Integration and Separation, Feb. 1996, pp. 10-1 - 10-9.
  7. Mendenhall, M. R., Lesieutre, T. O., Lesieutre, D. J., and Dillenius, M. F. E., "Carriage and Release Aerodynamics of the Pegasus Air-Launched Space Booster," AGARD CP-570, Aerodynamics of Store Integration and Separation, Feb. 1996, pp. 11-1 - 11-12.
  8. Dillenius, M. F. E., Lesieutre, D. J., Whittaker, C. H., and Lesieutre, T. O., "New Application of Engineering Level Missile Aerodynamics and Store Separation Prediction Methods," AIAA-1994-0028, Jan. 1994.
  9. Dillenius, M. F. E., Perkins, S. C., Jr., Johnson, D. L., and Lesieutre, D. J., "Engineering Level Predictions for External Store Separation and Submunition Aerodynamics," Store Carriage, Integration, and Release Proceedings, Royal Aeronautical Society, Apr. 1990, pp. 18.1 - 18.21.

Aero Software Licensing and Training

Missile Aerodynamics Prediction:  MISL3
Detailed Missile Loads:  MISDL
Euler Solver: NEARZEUSIN (with Inlets) /ZEUSBL
Aircraft Store Separation and Carriage Loads Analysis: STRLNCH
Aircraft Unsteady Maneuvering: SHAMAN
Unsteady Hydrodynamic Analysis: SUBFLO_2
User’s Training for all NEAR Software
State Department Export License and TAA Preparation as Required

 



 

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