Flow field numerical simulation method, device and equipment based on modified RK format

• Main Authors: CHEN YAMING, ZHANG ZIXUAN
• Format: Patent
• Language: Chinese; English
• Published: 26.07.2024
• Subjects: AIRCRAFT; AVIATION; CALCULATING; COMPUTING; COSMONAUTICS; COUNTING; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING ORREPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; ELECTRIC DIGITAL DATA PROCESSING; GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLYADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFTCOMPONENTS, NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; PHYSICS; TRANSPORTING

The invention relates to a flow field numerical simulation method, device and equipment based on a modified RK format. According to the method, a classic RK format is corrected, a physical quantity numerical simulation result which is physically positive is ensured to be positive by a simple and effective double-mapping method, a guaranteed Runge-Kutta format is constructed, a WCNS format is used as a spatial format, and the problem that the WCNS format cannot perform calculation under the conditions of strong shock waves, discontinuity and the like is solved. According to the method, a time integral type correction method which is not influenced by a spatial format is adopted, the method can be used for correction of WCNS, WENO, spectral difference, DG and other formats, the problem of calculation failure possibly caused by extreme working conditions or severe change of high-order format calculation simulation is solved, and the method can be applied to numerical simulation of aircraft, detonation wave flow