Verification of spatial and temporal pressure distributions in segmented solid rocket motors

Salita, Mark

doi:10.2514/6.1989-298

Cited by 9 publications

(9 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…, are the total energy and total enthalpy of the gas flow, H=c 0 T 0 is the combustion heat of solid propellant and the source terms that include fault terms at a given location x 0 have the form This model extends the previous work 27,27 in a number of important directions. To model various uncontrollable sources of noise (such as cracks and case vibrations) that may become essential in off-nominal conditions and may screen the variation of the system parameters a random component in the propellant density p→p[1+√σ•(t)] is introduced.…”

Section: A Internal Ballistics Of the Srmmentioning

confidence: 73%

See 1 more Smart Citation

Mathematical and Critical Physics Analysis of Engineering Problems: Old-New Way of Doing Things

Smelyanskiy¹,

Осипов

Luchinsky

et al. 2011

AIAA SPACE 2011 Conference &Amp; Exposition

View full text Add to dashboard Cite

In a modern world, importance of computer modeling for solving complex engineering problems cannot be overstated. However, in a number of critical engineering problems computational models cannot provide unique answer and so further physical and analytical insight is required to guide computer simulations. Such an insight becomes even more valuable when off-nominal regimes of operation have to be considered. To deal with complexity of the physical process at the interface of multiple engineering systems a new discipline is emergingoperational physics of critical missions. This discipline combines an old-good physics based approach to modeling engineering problems with modern advanced technologies for analyzing continuous and discrete information flow involving multiple modes of operation in uncertain environments, unknown state variables, heterogeneous software and hardware components. In this paper the new approach is illustrated using as an example analysis of the critical physics phenomena that lead to Challenger accident including physics of cryogenic explosion and propagation of detonation waves, internal ballistics of SRM's in the presence of the case breach fault, and monitoring of the structural integrity of the spacecraft.

show abstract

Section: A Internal Ballistics Of the Srmmentioning

confidence: 73%

“…The internal ballistics of the SRMs in the presence of the fault can be conveniently described by the following set of stochastic partial differential equations representing conservation laws for mass momentum, and energy of the gas 27,[27][28][29][30][31][32][33]…”

Section: A Internal Ballistics Of the Srmmentioning

confidence: 99%

Mathematical and Critical Physics Analysis of Engineering Problems: Old-New Way of Doing Things

Smelyanskiy¹,

Осипов

Luchinsky

et al. 2011

AIAA SPACE 2011 Conference &Amp; Exposition

View full text Add to dashboard Cite

show abstract

“…For SRBs with high length-to-diameter ratios a very good approximation to the internal ballistics can be obtained using a modified model by Salita 15 (see also Sorkin 16 ) (…”

Section: A Basic Modelmentioning

confidence: 99%

“…To derive the LDPM of the case breach fault we notice that for a subscale motors the flow in the chamber can be modeled very accurately using a zero-dimensional approximation 15,18,19 . Therefore the LDPM of the case breach fault in the sub-scale motor can be derived by integration of Eqs (1) along the rocket axis and by adding Eqs (3)-( 5), ( 7) to obtain ( )…”

Section: Low-dimensional Model Of the Case Breach Faultmentioning

confidence: 99%

Development of an On-Board Failure Diagnostics and Prognostics System for Solid Rocket Booster

Smelyanskiy¹,

Luchinsky²,

Osipov³

et al. 2008

44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference &Amp;amp; Exhibit

View full text Add to dashboard Cite

We develop a case breach model for the on-board fault diagnostics and prognostics system for subscale solid-rocket boosters (SRBs). The model development was motivated by recent ground firing tests, in which a deviation of measured time-traces from the predicted time-series was observed. A modified model takes into account the nozzle ablation, including the effect of roughness of the nozzle surface, the geometry of the fault, and erosion and burning of the walls of the hole in the metal case. The derived low-dimensional performance model (LDPM) of the fault can reproduce the observed time-series data very well. To verify the performance of the LDPM we build a FLUENT model of the case breach fault and demonstrate a good agreement between theoretical predictions based on the analytical solution of the model equations and the results of the FLUENT simulations. We then incorporate the derived LDPM into an inferential Bayesian framework and verify performance of the Bayesian algorithm for the diagnostics and prognostics of the case breach fault. It is shown that the obtained LDPM allows one to track parameters of the SRB during the flight in real time, to diagnose case breach fault, and to predict its values in the future. The application of the method to fault diagnostics and prognostics (FD&P) of other SRB faults modes is discussed.

show abstract

“…To this end we introduce a low-dimensional performance model of SRM in the "filling volume" approximation [39,40]. For a subscale motor the ratio of the gas velocity to the stagnation speed of sound c 0 is small (u 2 /c 0 1) everywhere along the propellant grain.…”

Section: Low-dimensional Performance Modelmentioning

confidence: 99%

A Combined Model-Based and Data-Driven Prognostic Approach for Aircraft System Life Management

2016

Machine Learning and Knowledge Discovery for Engineering Systems Health Management

View full text Add to dashboard Cite

Verification of spatial and temporal pressure distributions in segmented solid rocket motors

Cited by 9 publications

References 2 publications

Mathematical and Critical Physics Analysis of Engineering Problems: Old-New Way of Doing Things

Mathematical and Critical Physics Analysis of Engineering Problems: Old-New Way of Doing Things

Development of an On-Board Failure Diagnostics and Prognostics System for Solid Rocket Booster

A Combined Model-Based and Data-Driven Prognostic Approach for Aircraft System Life Management

Contact Info

Product

Resources

About