9 Result(s)
within
Zhi-hua Gan
Engineering
Classical and Continuum Physics
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Article
Temperature inhomogeneity in high capacity pulse tube cryocoolers
High power pulse tube cryocoolers are expected to be a very promising candidate for high temperature superconductors (HTS) cooling. Unfortunately there are still some problems significantly deteriorating the p...
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Article
Performance of a precooled 4 K Stirling type high frequency pulse tube cryocooler with Gd2O2S
The efficiency of 4 K Stirling type pulse tube cryocoolers (SPTCs) is rather low due to significant regenerator losses associated with the unique properties of helium around 4 K and the high operating frequenc...
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Article
Acoustic impedance characteristics of linear compressors
The acoustic field of a linear compressor serves to deliver the compression work to the load, such as the connected cold head of a cryocooler; it plays an equivalently important role as the electrical and mech...
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Article
Influence of compression-expansion effect on oscillating-flow heat transfer in a finned heat exchanger
Compression and expansion of a working gas due to the pressure oscillation of an oscillating flow can lead to a temperature variation of the working gas, which will affect the heat transfer in the oscillating ...
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Article
Design and preliminary experimental investigation of a 4 K Stirling-type pulse tube cryocooler with precooling
A Stirling-type pulse tube cryocooler (PTC) with precooling was designed and manufactured to investigate its performance at 4 K. Numerical simulation was carried out based on the well-known regenerator model R...
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Article
Measurement of boiling heat transfer coefficient in liquid nitrogen bath by inverse heat conduction method
Inverse heat conduction method (IHCM) is one of the most effective approaches to obtaining the boiling heat transfer coefficient from measured results. This paper focuses on its application in cryogenic boilin...
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Article
Liquid film dryout model for predicting critical heat flux in annular two-phase flow
Gas-liquid two-phase flow and heat transfer can be encountered in numerous fields, such as chemical engineering, refrigeration, nuclear power reactor, metallurgical industry, spaceflight. Its critical heat flu...
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Article
Study on a 5.0 W/80 K single stage Stirling type pulse tube cryocooler
A single stage Stirling pulse tube cryocooler was designed based on REGEN 3.2 and fabricated for testing. The experimental results show that the cooler can provide a cooling capacity of 5.0 W at 79.1 K, and pr...
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Article
Computational fluid dynamic simulation of an inter-phasing pulse tube cooler
An inter-phasing pulse tube cooler (IPPTC) consists of two pulse tube units, which are connected to each other at hot ends of the pulse tubes through a needle valve. This paper presents the computational fluid...
