Validation results for the LOGOS multifunction software package in solving problems of aerodynamics and gas dynamics for the lift-off and injection of launch vehicles

2015 ◽  
Vol 7 (2) ◽  
pp. 144-153 ◽  
Author(s):  
Yu. N. Deryugin ◽  
R. N. Zhuchkov ◽  
D. K. Zelenskiy ◽  
A. S. Kozelkov ◽  
A. V. Sarazov ◽  
...  
Keyword(s):  
Gas Dynamics ◽  
Software Package ◽  
Launch Vehicles ◽  
Lift Off

scholarly journals Solution of the conjugate problem of gas dynamics and heat transfer in structures with a large ratio of geometric scale values

2017 ◽  
pp. 69-74
Author(s):  
D. A. Romanyuk ◽  
S. V. Panfilov ◽  
D. S. Gromov
Keyword(s):  
Gas Dynamics ◽  
Software Package ◽  
Thermal State ◽  
Mathematical Formulation ◽  
Research Work ◽  
Conjugate Problem ◽  
Thermal Processes ◽  
Ansys Fluent ◽  
Fluent Software ◽  
Volume Method

Within the scope of the research work, we have developed the methods and software package for solving the conjugate heat and hydraulic problems based on the classical approach to performing hydraulic calculations and modeling thermal processes by means of the finite volume method in the ANSYS Fluent software package. The developed means allowed us to efficiently calculate the thermal state of complex technical objects. The study gives mathematical formulation of the methods and suggests the results of their approbation and verification

Experimental study on lift-off acoustic environments of launch vehicles by scaled cold jet

2014 ◽  
Vol 136 (4) ◽  
pp. 2168-2168
Author(s):  
Hiroki Ashida ◽  
Yousuke Takeyama ◽  
Kiyotaka Fujita ◽  
Aki Azusawa
Keyword(s):  
Experimental Study ◽  
Launch Vehicles ◽  
Lift Off ◽  
Acoustic Environments

scholarly journals On Some Unsolved Problems of Mathematica

2012 ◽  
Vol 2 (4) ◽  
pp. 259-264
Author(s):  
E. V. Vorozhtsov
Keyword(s):  
Gas Dynamics ◽  
Software Package ◽  
Two Dimensional ◽  
Fortran Code ◽  
Gas Dynamics Problems ◽  
Dynamics Problems ◽  
Mathematica Software ◽  
Alternate Routes ◽  
Computing Speed

In this paper, some unsolved problems of the Mathematica software package are documented. At first, it is shown, using a number of examples, that the processing (simplification) of rational-fractional expressions involving powers in the general form, has been implemented in Maple more carefully than in Mathematica. Then, an error in Mathematica is demonstrated, leading to incorrect results at a change of a function’s body. For each example of symbolic or symbolic-numeric computations, alternate routes for solving the emerged problem are proposed (where possible). An added problem, related to Mathematica’s computing speed is documented, employing examples related to two-dimensional gas dynamics problems. It is shown that Mathematica computes rather slowly (about one thousand times slower) compared to a Fortran code.

Investigating the Effect of the Axial Clearance Magnitude Between the Covering Disc of the Runner and the Centrifugal Compressor Body on the Gas Dynamics in a Low-Discharge Stage Prototype

2020 ◽  
pp. 106-120
Author(s):  
A.M. Yablokov ◽  
R.A. Shtanichev ◽  
N.I. Sadovskiy ◽  
Yu.V. Kozhukhov
Keyword(s):  
Experimental Data ◽  
Centrifugal Compressor ◽  
Gas Dynamics ◽  
Software Package ◽  
Gas Flow ◽  
Compressor Stage ◽  
Peter The Great ◽  
Mesh Independence ◽  
Ansys Cfx ◽  
Axial Clearance

The paper presents the results of numerically investigating viscous gas flow in a simulated low-discharge stage of a super high-pressure type compressor, using the ANSYS CFX software package. We studied the low-discharge centrifugal compressor stage prototype designed and tested at the Compressor, Vacuum and Refrigerating Technology Department of Peter the Great St. Petersburg Polytechnic University. In order to conduct the numerical experiment, we performed a mesh independence study. We compared the properties obtained in the numerical investigation to the experimental data. In our mathematical simulation the magnitude of the axial clearance between the covering disc of the runner and the compressor body varies in the range of 1--5.5 mm; we estimate the effect that varying this number has on the loss complex characteristic 1 + βfriction + βleakage

scholarly journals Application of open-source software for industrial problems of vehicle lift-off gas dynamics

2018 ◽  
Vol 16 (4) ◽  
pp. 7
Author(s):  
T. O. Abdurashidov ◽  
A. V. Osipov ◽  
V. N. Korchagova ◽  
M. V. Kraposhin ◽  
Ye. V. Smirnova ◽  
...  
Keyword(s):  
Open Source ◽  
Open Source Software ◽  
Gas Dynamics ◽  
Lift Off

scholarly journals Numerical investigation of gas dynamics in the pyro actuator found in the mechanism for unfolding aerodynamic surfaces

2017 ◽  
pp. 37-42
Author(s):  
M. N. Pravidlo ◽  
N. A. Lyubimova ◽  
L. V. Bykov
Keyword(s):  
Mathematical Model ◽  
Numerical Investigation ◽  
Gas Dynamics ◽  
Software Package ◽  
Dynamic Processes ◽  
Ansys Software ◽  
Collector System ◽  
Gas Dynamic ◽  
The Mathematical Model ◽  
Aerodynamic Surfaces

The article presents a mathematical model of a pyro actuator found in the mechanism for unfolding aerodynamic surfaces of aircraft, which includes a collector system. The mathematical model proposed takes into account linked gas dynamic processes in the internal pyro actuator chambers and the dynamics of its mechanical traveller. We supply results of numerically investigating the main parameters of working body flow, obtained by using the ANSYS software package.

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