| 摘要 |
A high temperature and pressure test chamber contains a specimen uniformly heated by circulating fluid heated by a heater on a chamber end cover. A device, for studying the physical properties of a solid specimen (S) in the presence of fluids at elevated temperatures and pressures, comprises a long rigid body (1) closed at its ends by covers (3, 4), a flexible sheath (9) around the specimen and cooperating with two plugs (7, 8) to delimit the body interior, a confinement chamber, a system for displacing fluids under pressure across the specimen, a measuring system for measuring various specimen parameters and a pump (P) for injecting fluid under pressure into an annular space around the sheath (9) to exert a radial pressure around the specimen. The device also has a heater associated with one of the covers (3, 4) and a circulation system for circulating heated fluid about the sheath and for homogenizing the specimen temperature. Preferred Features: The heater comprises electrical resistances and the circulation system comprises a stirrer (12) cooperating with a fluid circulation circuit (15, 17-19). The stirrer (12) is a turbine driven by a motor (14) which is fitted in one (3) of the covers. The circulation circuit comprises a tube (17) which is located in the annular space between the rigid body (1) and the sheath (9) and which is connected between conduits (15, 18, 19) within the covers (3, 4). The body (1) has a tubular portion (2) of composite material and covers (3, 4) which consist of thermally conductive material and which are fixed to the body (1) by tie-rods (23) of composite material. Channels (10) extend through the covers (3, 4) for connecting the specimen ends with the circulation system. The measuring system comprises a unit for measuring radiation absorption by the specimen (S).
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