Favve and Coantia 



4. Tests of Temperature and Humidity Control Systems 



Various working tests of that part of the equipment have been 

 executed. The validity of the previously chosen control methods 

 has been checked, the obtainable temperature and humidity range 

 has been controlled, and the stability of regulating loops has been 

 tested. After some improvements, the overall thermodynamic per- 

 formance of the nnodel has been correct. 



A further study of temperature repartitions upstream and 

 inside the working section has then been undertaken, for different 

 flow and thermal conditions. Typical results are shown by Fig. 17, 

 where an initially isothermal airflow, and the development of thermal 

 boundary layers can be observed. The temperature distribution in 

 the entrance section is usually good, except in extreme cases of 

 large heating and velocities of the order of one meter per second, 

 where parasitic stratification effects appear. 



Uo = 2.60m/s 8o = 52°C 1^,^27 X 



30 



20 



0-00 °C 



30 



Fig. 17. Temperature Distribution in the Model's Test Section 



V. CONSTRUCTION OF THE LARGE AIR-SEA INTERACTION 

 FACILITY 



In view of the rather considerable size of the designed wind- 

 wave tunnel, its erection was not possible inside I.M. S. T. 's main 

 building. It was therefore decided to build a new laboratory, includ- 

 ing the large air-sea facility, its auxiliary equipments and a group 

 of offices, workshops and laboratories, and located in the new 

 Marseille -Luminy Campus. Its floor plan is shown by Fig. 18. 



58 



