Journal
SCIENTIFIC AND TECHNICAL JOURNAL OF INFORMATION TECHNOLOGIES, MECHANICS AND OPTICS
UDK
Issue:5 (99)
INTERFERENCE HYSTERESIS OF COUNTERPROPAGATING SHOCK WAVES AT A CHANGE IN MACH NUMBER
Annotation
Subject of Study. We study the interference of counterpropagating shock waves and oblique shock reflection from the wall. There are two fundamentally different interaction modes of counterpropagating shocks: four-wave regular and five-wave irregular ones. The transition from one mode to another can be abrupt or smooth; it can also be accompanied by hysteresis. Hysteresis is the existence of two different types of shock-wave structures with the same parameters of interference. The implementation of a particular decision depends on the direction and perhaps the rate of change of parameters. Hysteresis in the interference of counterpropagating shocks and oblique shock wave reflection from the wall has been studying since the mid-60s of the XX-th century, the most actively in the past 20 years. This is due to the development of new types of internal and mixed compression intakes, in particular, intended for high supersonic and hypersonic speeds. Despite of problem research for many years, many questions still remain unclarified and among them nonconcurrence of the numerical and physical experiment results with the data obtained by analytical theory of interference stationary gas-dynamic discontinuities, the effect of the rate change for parameters, the accuracy of calculations, the difference grid density. The present paper deals with the impact of two factors: the rank of difference grid and blurring degree of shock waves front. Main Results. Analytical and numerical calculations have shown that blurring of shock waves and the transition from small difference grid to a coarser one is accompanied by narrowing of the hysteresis domain, i.e. the transitions from regular to irregular reflection and backwards are more different from those predicted by the theory. Reducing the size of the difference grid cells leads to solution convergence to the results of interference theory of stationary gas-dynamic discontinuities. Practical Relevance. Obtained findings complement the interference theory of stationary gas-dynamic discontinuities and are usable in the design of advanced models of supersonic and hypersonic aircrafts.
Keywords
Постоянный URL
Articles in current issue
- THE INFLUENCE OF PLASMONIC AND DIELECTRIC INCLUSIONS ON ANTIREFLECTIVE PROPERTIES OF HOMOGENEOUS COATINGS FOR SILICON PHOTOVOLTAIC STRUCTURES
- SIMULATION OF FORWARD AND BACKWARD WAVES EVOLUTION OF FEW-CYCLE PULSES PROPAGATING IN AN OPTICAL WAVEGUIDE WITH DISPERSION AND CUBIC NONLINEARITY OF ELECTRONIC AND ELECTRONIC-VIBRATION NATURE
- RESEARCH OF LINEAR AND NONLINEAR PROCESSES AT FEMTOSECOND LASER RADIATION PROPAGATION IN THE MEDIUM SIMULATING THE HUMAN EYE VITREOUS
- OUT-OF-FOCUS REGION SEGMENTATION OF 2D SURFACE IMAGES WITH THE USE OF TEXTURE FEATURES
- IMPACT STUDY OF ANISOTROPIC OPTICAL FIBERS WINDING WITH DIFFERENT TENSION VALUE ON THE H-PARAMETER INVARIANCE DEGREE
- APPLICATION OF SPATIAL LIGHT MODULATORS FOR GENERATION OF LASER BEAMS WITH A SPIRAL PHASE DISTRIBUTION
- REFINED MODEL OF THE OPTICAL SYSTEM FOR SPACE MINI-VEHICLES WITH LASER PROPULSION
- RESEARCH OF NIGHT LIGHT EFFECTS ON COLORIMETRIC CHARACTERISTICS OF IMAGE PERCEIVED BY THE PILOT IN AN AIRCRAFT COCKPIT
- ELECTRON MICROSCOPIC INVESTIGATION OF YTTRIUM ALUMINUM GARNET POWDERS Y3AL5O12, SYNTHESIZED BY SOL–GEL METHOD
- CENTRAL WAVELENGTH ADJUSTMENT OF LIGHT EMITTING SOURCE IN INTERFEROMETRIC SENSORS BASED ON FIBER-OPTIC BRAGG GRATINGS
- MODELING OF DYNAMIC SYSTEMS WITH MODULATION BY MEANS OF KRONECKER VECTOR-MATRIX REPRESENTATION
- PERMITTIVITY DISPERSION FEATURES OF A NEMATIC LIQUID CRYSTAL WITH QUANTUM DOTS
- INTERACTION OF SILVER MOLECULAR CLUSTERS, INTRODUCED BY LOW-TEMPERATURE ION EXCHANGE METHOD, WITH NANOPARTICLES OF CdS IN FLUORINE PHOSPHATE GLASSES
- EFFICIENCY EVALUATION OF ENTERPRISE INFORMATION SYSTEMS WITH NON-UNIFORM LOAD
- SEMSIN SEMANTIC AND SYNTACTIC PARSER
- RISK MANAGEMENT AUTOMATION OF SOFTWARE PROJECTS BASED ОN FUZZY INFERENCE
- APPLICATION OF PARTIAL LEAST SQUARES REGRESSION FOR AUDIO-VISUAL SPEECH PROCESSING AND MODELING
- ACCURACY RESEARCH OF THE DIAMETRICAL SIZES FORMING AT GEAR SHAPING BY STEPPED CUTTER
- MASS FLOW METER FOR LIQUIDS
- SOFTWARE TOOLS FOR COMPUTING EXPERIMENT AIMED AT MULTIVARIATE ANALYSIS IMPLEMENTATION
- INVESTIGATION OF STURM-LIOUVILLE PROBLEM SOLVABILITY IN THE PROCESS OF ASYMPTOTIC SERIES CREATION
- ELEMENT DESIGN FOR AN INKJET SYSTEM OF HYDROSTATIC GAS BEARING CONTROL
- ASYMMETRICAL INTERFERENCE OF COUNTER OBLIQUE SHOCK WAVES
- THE APPROACHING TRAIN DETECTION ALGORITHM
- ON THE PAPER BY L.S. KONEV ET AL. “SIMULATING EVOLUTION OF FORWARD AND BACKWARD WAVES OF FEW-CYCLE PULSES PROPAGATING IN AN OPTICAL WAVEGUIDE WITH DISPERSION AND CUBIC NONLINEARITY OF ELECTRONIC AND ELECTRONIC-VIBRATION NATURE”