Thiruvananthapuram-based VSSC leveraged superior supplies like Carbon-Carbon (C-C) composites to create a nozzle divergent that provides distinctive properties, an ISRO assertion mentioned.
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By utilising processes similar to carbonisation of inexperienced composites, chemical vapor Infiltration, and high-temperature therapy, it has produced a nozzle with low density, excessive particular power, and wonderful stiffness, able to retaining mechanical properties even at elevated temperatures, it mentioned.
A key function of the C-C nozzle is its particular anti-oxidation coating of silicon carbide, which extends its operational limits in oxidising environments. This innovation not solely reduces thermally induced stresses but in addition enhances corrosion resistance, permitting for prolonged operational temperature limits in hostile environments, in line with ISRO.
The potential influence of this improvement is important, significantly for the ISRO’s workhorse launcher, the Polar Satellite tv for pc Launch Car (PSLV). The PS4, the fourth stage of the PSLV, at present employs twin engines with nozzles produced from columbium alloy. Nevertheless, by changing these metallic divergent nozzles with C-C counterparts, a mass discount of roughly 67 per cent might be achieved, the house company mentioned.
This substitution is projected to extend the payload functionality of the PSLV by 15 kg, a notable enhancement for house missions. The profitable testing of the C-C nozzle divergent marked a significant milestone for ISRO.
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On March 19, 2024, a 60-second scorching take a look at was performed on the Excessive-Altitude Take a look at (HAT) facility in ISRO Propulsion Complicated (IPRC), Mahendragiri in Tamil Nadu, confirming the system’s efficiency and {hardware} integrity. “Subsequent exams, together with a 200-second scorching take a look at on April 2, 2024, additional validated the nozzle’s capabilities, with temperatures reaching 1216 Ok, matching predictions,” the discharge mentioned.
The collaborative effort concerned the Liquid Propulsion Techniques Centre (LPSC) at Valiamala close to Thiruvananthapuram which designed and configured the take a look at, and IPRC, which performed the instrumentation and execution of the exams at its HAT facility, it was famous.
