Prediction of Launch Vehicle Ignition Overpressure and Liftoff Acoustic Environments

Applied Research Associates, Inc.

Littleton, CO

Prediction software has been developed to specify acoustic pressure loading (ignition overpressure and launch acoustics) produced during liftoff on the external surfaces of launch vehicles from the propulsion system. The launch vehicle and launch pad models are developed by interaction with the user, which allows a large variety of configurations and trajectories. Overpressure mitigation through water injection can also be predicted.

• Software has been delivered to NASA.
• Firm has invested more than $10,000 to upgrade software.

• Product name is Launch Acoustics and Ignition Overpressure (LAIOP) software.
• Market sector includes large aerospace companies (Lockheed Martin, Boeing, Orbital Sciences) that develop launch vehicles.
• Software is being included in proposal to large aerospace company to define external launch loads when flying an exiting launch vehicle off a new launch pad.
• Venture structure is a new business segment within Applied Research Associates (ARA).
• Software has unique prediction capabilities not found in any other commercially available software.
• ARA contacted by ESI North America (formerly Vibro-Acoustic Sciences) to possibly market LAIOP, effort pending.
• ARA contacted by N-Muniz Engineering, Inc. about purchasing a copy of LAIOP, effort pending.

• In addition to potential Columbia accident investigations, other potential applications include: prediction of acoustic loads on rocket engine test stands (NASA, Air Force), predictions of launch loads on new launch vehicles (Shuttle replacement), as well as predictions for propulsion system upgrades, launch pad modifications, and development of new launch facilities.
• Cost savings is ~2 man weeks per application (~$10,000 per event). For new launch vehicle development, cost savings >~$500,000 per vehicle, including significant reduction of required subscale testing.
  

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Curator: SBIR Support                8/23/05