A Compressible Fluid Power Dynamic Model of a Liquid Propellant Powered Rifle

2004 ◽  
Author(s):  
Mark Adams ◽  
Eric J. Barth
Keyword(s):  
Dynamic Model ◽  
Compressible Fluid ◽  
Hydrocarbon Fuel ◽  
Fluid Power ◽  
Chamber Pressure ◽  
Phase Reaction ◽  
Liquid Propellant ◽  
Interior Ballistics ◽  
Time Simulation ◽  
Condensed Phase Reaction

This paper presents a dynamic model of the interior ballistics of an experimental liquid propellant-powered rifle. The liquid propellant-powered rifle described utilizes a misture of Hydroxyl Ammonium Nitrate (HAN) and hydrocarbon fuel to replace gunpowder typically used in such firearms. The motivation for such a development is to discard the need for a shell casing whereby carrying only propellant and bullets will reduce both the mass and volume per shot carried by the soldier. A first-principles dynamic model of the interior ballistics is derived as a compressible fluid power problem with the chemical liberation of heat within the chamber modeled via a condensed-phase reaction rate law. The model is used to predict the overall performance in terms of ballistic kinetic energy as well as draw design insight regarding the role of friction, chamber geometry, and the profile of chamber pressure with respect to time. Simulation results are presented as well as preliminary experimental results from a proof-of concept device.

Dynamic Modeling and Design of a Bulk-Loaded Liquid Monopropellant Powered Rifle

2008 ◽  
Vol 130 (6) ◽  
Author(s):  
Mark Adams ◽  
Eric J. Barth
Keyword(s):  
Dynamic Model ◽  
Hydrocarbon Fuel ◽  
Chamber Pressure ◽  
Phase Reaction ◽  
Liquid Propellant ◽  
Interior Ballistics ◽  
Time Simulation ◽  
Condensed Phase Reaction ◽  
Power Problem

This paper presents a dynamic model of the interior ballistics of an experimental liquid propellant powered rifle. The liquid propellant powered rifle described utilizes a mixture of hydroxyl ammonium nitrate and hydrocarbon fuel to replace gunpowder typically used in such firearms. The motivation for such a development is to discard the need for a shell casing whereby carrying only propellant and bullets will reduce both the mass and volume per shot carried by the soldier. A first-principles dynamic model of the interior ballistics is derived as a compressible fluid power problem with the chemical liberation of heat within the chamber modeled via a condensed-phase reaction rate law. The model is used to predict the overall performance in terms of ballistic kinetic energy as well as draw design insight regarding the role of friction, chamber geometry, and the profile of chamber pressure with respect to time. Simulation results are presented as well as preliminary experimental results from a proof-of-concept device.

Evidence for the Predominance of Condensed Phase Reaction in Chemical Looping Reactions between Carbon and Oxygen Carriers

2012 ◽  
Vol 116 (46) ◽  
pp. 24496-24502 ◽  
Author(s):  
Nicholas W. Piekiel ◽  
Garth C. Egan ◽  
Kyle T. Sullivan ◽  
Michael R. Zachariah
Keyword(s):  
Condensed Phase ◽  
Chemical Looping ◽  
Phase Reaction ◽  
Oxygen Carriers ◽  
Condensed Phase Reaction

Dynamic model of a storage system with real-time simulation for power system reliability

2014 ◽  
Vol 25 (11) ◽  
pp. 3109-3121 ◽  
Author(s):  
Morris Brenna ◽  
Federica Foiadelli ◽  
Stefano Riva ◽  
Gianluca Sapienza ◽  
Dario Zaninelli
Keyword(s):  
Power System ◽  
Real Time ◽  
Dynamic Model ◽  
System Reliability ◽  
Storage System ◽  
Power System Reliability ◽  
Real Time Simulation ◽  
Time Simulation

Time-Resolved Nanosecond Imaging of Nanoscale Condensed Phase Reaction

2015 ◽  
pp. 150127145402000 ◽  
Author(s):  
Garth C. Egan ◽  
Thomas LaGrange ◽  
Michael R. Zachariah
Keyword(s):  
Condensed Phase ◽  
Phase Reaction ◽  
Time Resolved ◽  
Condensed Phase Reaction

INTERIOR BALLISTICS OF LIQUID PROPELLANT SMALL ARMS

1956 ◽  
Author(s):  
Raymond R. Shaw ◽  
W. Fagan ◽  
P. P. Haag ◽  
A. D. Kafadar ◽  
S. Levin ◽  
...  
Keyword(s):  
Liquid Propellant ◽  
Small Arms ◽  
Interior Ballistics

The Interior Ballistics of Regenerative Liquid Propellant Guns

1987 ◽  
Author(s):  
Walter F. Morrison ◽  
Paul G. Baer ◽  
Melvin J. Bulman ◽  
John Mandzy
Keyword(s):  
Liquid Propellant ◽  
Interior Ballistics

A Comparison of Analytical and Experimental Local Heat Fluxes in Liquid-Propellant Rocket Thrust Chambers

1962 ◽  
Vol 84 (1) ◽  
pp. 19-28 ◽  
Author(s):  
William E. Welsh ◽  
Arvel B. Witte
Keyword(s):  
Heat Flux ◽  
Flow Characteristics ◽  
Heat Fluxes ◽  
Chamber Pressure ◽  
Liquid Propellant ◽  
Nitrogen Tetroxide ◽  
Thrust Chamber ◽  
Experimental Heat ◽  
Rocket Thrust ◽  
Propellant Rocket

Experimental data are presented showing heat-flux distributions measured calorimetrically with several liquid-propellant rocket thrust-chamber configurations. Thrust levels of the experimental chambers were from 300 to 5000 lb. Enzian-type and axial-stream showerhead propellant injectors were utilized with hydrazine (N2H4) and nitrogen tetroxide (N2O4) propellants. Nozzle-contraction-area ratios of 8 to 1, 4 to 1, and 1.64 to 1 were tested, each having a 5-in. inlet diameter. Characteristic chamber lengths ranged from 16.95 to 62.8 in. The comparison between the experimental heat flux and the analytical heat flux using the method of Bartz [1] was found to be closest in the nozzle-expansion region. The experimental heat-flux measurements ranged between 80 per cent above and 45 per cent below the analytical estimates at the nozzle throat, however. These differences were dependent upon thrust-chamber configuration, injector type, and chamber pressure, and apparently resulted from nonideal combustion and flow characteristics. It is concluded that a priori determination of heat-flux distribution along the thrust-chamber length was possible only to a first approximation for the conditions of these tests.

LQR Feedback Control Development for Wind Turbines Featuring a Digital Fluid Power Transmission System

2016 ◽  
Author(s):  
Niels H. Pedersen ◽  
Per Johansen ◽  
Torben O. Andersen
Keyword(s):  
Wind Turbine ◽  
Dynamic Model ◽  
Control Strategy ◽  
Linear Time ◽  
Control Design ◽  
Design Approach ◽  
Fluid Power ◽  
Full Field ◽  
Delta Sigma ◽  
Pulse Density

Research within digital fluid power (DFP) transmissions is receiving an increased attention as an alternative to conventional transmission technologies. The use of DFP displacement machines entails a need for applicable control algorithms. However, the design and analysis of controllers for such digital systems are complicated by its non-smooth behavior. In this paper a control design approach for a digital displacement machine® is proposed and a performance analysis of a wind turbine using a DFP transmission is presented. The performance evaluation is based on a dynamic model of the transmission with a DFP motor, which has been combined with the NREL 5-MW reference wind turbine model. A classical variable speed control strategy for wind speeds below rated is proposed for the turbine, where the pump displacement is fixed and the digital motor displacement is varied for pressure control. The digital motor control strategy consists of a full stroke operation strategy, where a Delta-Sigma pulse density modulator is used to determine the chamber activation sequence. In the LQR-control design approach, the discrete behavior of the motor and Delta-Sigma modulator is described by a discrete linear time invariant model. Using full-field flow wind profiles as input, the design approach and control performance is verified by simulation in the dynamic model of the wind turbine featuring the DFP transmission. Additionally, the performance is compared to that of the conventional NREL reference turbine, transmission and controller.

scholarly journals Real-Time Simulation of Fluid Power Systems Containing Small Oil Volumes, Using the Method of Multiple Scales

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 196940-196950
Author(s):  
Mehran Kiani-Oshtorjani ◽  
Stanislav Ustinov ◽  
Heikki Handroos ◽  
Payman Jalali ◽  
Aki Mikkola
Keyword(s):  
Power Systems ◽  
Real Time ◽  
Multiple Scales ◽  
Method Of Multiple Scales ◽  
Fluid Power ◽  
Real Time Simulation ◽  
Time Simulation ◽  
Fluid Power Systems
Sign in / Sign up

Export Citation Format

Share Document