R. Karunanithi

TL;DR: In this article, the authors used computational fluid dynamics (CFD) and experimental studies towards the optimization of the Ranque-Hilsch vortex tubes for obtaining the maximum hot gas temperature and minimum cold gas temperature.

TL;DR: In this article, the thermal performance of multilayer insulation (MLI) consisting of double aluminized Mylar radiation shields and nylon net thermal spacers was evaluated using a double guarded cylindrical calorimeter and a tank-calorimeter over the temperature range 300-77 K. The degradation in effective thermal conductivity of MLI was evaluated to be 1.68 using the calorimeters.

TL;DR: In this article, a simple analytical method has been employed for heat transfer analysis of experimental data obtained through calorimetric investigations on multilayer insulation (MLI), which has shown that the effective thermal conductivity varies from section to section of the insulation structure and it has a peak which lies between the middle and warm boundary regions of the MLI.

TL;DR: A demountable transfer line has been designed and fabricated to carry out experimental studies on cooldown time and mass flow characteristics of a liquid nitrogen transfer line held in a horizontal position.

TL;DR: In this paper, the authors investigated the suitability of power transistors for cryogenic applications in the range 4.2 -300 K in BSS91 and BSS92 MOSFETs and found that these types of transistors are well suited for operations down to ≈ 30 K. However, below 30 K the operating characteristics make them unsuitable for application.