Team
Moshman Research hired by SafeWorks for intelligent powered access solution design
SafeWorks, the world leader in powered access solutions, has hired Moshman Research to design an intelligent control system for their EasyClimb Controller. Soon, the controller...
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To the Moon!
Moshman Research is advising Frontier Aerospace on multi-physics modeling of their latest in-space propulsion system. This liquid-fueled rocket will be part of the Artemis Mission,...
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Moshman Research presents Conference Publication at 2021 AIAA Aviation Forum
Nathan Moshman and Brian Sobulefsky present research on helicopter noise modeling at the 2021 AIAA Aviation Forum in the Propeller, Rotorcraft and V/STOL Noise Session....
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Moshman Research will be Hydrodynamics Lead on ARPA-e funded research
Just announced, Moshman Research will be part of a 3 year, $3.3M research effort to develop hydrokinetic riverine turbines for delivering clean, economically viable energy...
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Partners
High-Efficiency Blades
In developing our helicopter noise reduction technology, Moshman Research discovered another potential application; greater aerodynamic efficiency. At transonic speeds, we have shown that it is possible to generate positive lift at zero and negative angles of attack and increase the lift-to-drag ratio.
If you are interested in this idea, please fill out our contact form.
Blast Mitigation
When a solid grain rocket first kicks on there is a huge one-time boom that propagates spherically outward like an explosion. This blast wave can damage expensive launch pad equipment or, even worse, disrupt the launch. This is what the pressure field looks like over a few milliseconds:
This phenomena is called Ignition Over-Pressure (IOP). What launch providers do to suppress the IOP’s strength is to dump a bunch of water in the surrounding area. Water absorbs the energy of the shock in several ways, the most significant of which is through vaporization. What the following papers do is to quantify and optimize the process of using the vaporization of water droplets to optimally suppress the IOP’s strength.
The first paper simplifies the problem to a single-phase flow with a distributed energy sink. This was useful for demonstrating the requisite novel algorithm and gaining intuition on the flow control.
The single-phase problem formulation was published in the AIAA Journal:
Method for Optimally Controlling Unsteady Shock Strength in One Dimension
The second paper has the full two-phase droplet-shock interaction model and the results are the optimal spatial distribution of the water volume fraction for varying degrees of IOP attenuation.
The two-phase formulation was published in the International Journal of Flow Control:
A very thorough presentation of the problem is presented in this PhD Dissertation: