PROJECT DETAILS
CVI and CVD is a thermo-vacuum chamber operating up to 2500 Degree Celsius. CVI-CVD furnace is mainly to mold high-temperature sustainable composites used in supersonic missiles. This Thermo-vacuum facility is commissioned at DRDL- Hyderabad, the Defence Research and Development Organization (DRDO) propulsion complex, Ministry of Defence, Government of India. The electromagnetic Induction heater is used to generate higher operating temperatures of the order of 2500 Degree Celsius. Niharika Computational Engineering Solutions Pvt Ltd (NCES) has collaborated with the client and conducted Computational Fluid Dynamics (CFD) analysis to assess the thermal performance of the furnace. We also conducted structural analysis (FEA) to predict the thermal expansion of the plunger unit.
The aim of this CFD analysis is to examine the temperature distribution, calculate the heat retention in individual components, and validate the design of the integrated cooling systems.
A poly hex core mesh has been developed for the streamlined CAD model, incorporating a high-resolution mesh in regions with significant gradients. This mesh consists of 12 million cells and exhibits quality metrics that conform to the established standards of CFD analysis.
Both steady-state and transient CFD analyses have been conducted for this thermo vacuum system. The material properties are tailored, utilizing the data supplied in the relevant material specification sheet from the manufacturer.
The results of the CFD analysis have demonstrated that the design of the induction heater satisfies the thermal requirements. The performance of the integrated cooling systems is deemed satisfactory.
Finite Element Method (FEM) analysis is performed, utilizing the temperature data obtained from Computational Fluid Dynamics (CFD) analysis. The material properties are referenced according to the specifications provided by the manufacturers.
FEM analysis results have suggested that the stress values observed on the Steel parts are very near to Yield strength. The Tensile stress (Max. principal stress) observed on the Graphite are above Tensile strength of the Graphite. If we consider Compressive stress (Min. Principal stress), the stress values are below Compressive strength of Graphite.
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