The characteristics of the torch plasma exposed to the crosswind, varying from 0 to 11000 cm/s, have been investigated. The torch plasma behavior was observed and the arc voltage was measured. The voltage gradient of the torch plasma increased with increasing velocity of the crosswind. The results suggest that the augmentation of the voltage gradient was considered mainly as the influence of the cooling effect caused by the crosswind.

This paper investigates a behavior of a transferred plasma arc exposed to a cross airflow. The torch plasma behavior was observed, and the deflection on the anode surface was measured. The deflection on the anode surface increased with increasing velocity of the cross wind. From new phenomenon, it has been found that the torch plasma arcs have abundant elasticity. Moreover, the input plasma power with the cross-wind velocity was also studied.

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Many of the wide range of parameters for which plasma torch have been developed are relevant for plasma diagnostics and these include operating current, electrode distance, plasma diameter, and axial plasma gas flow rate, inside the temperature and ambient pressure. Furthermore, its physical properties such as plasma power, Young's Modulus and voltage gradient become very im portant for the following reasons: the torch plasma is required to be bent; the torch plasma is considered using outside where wind blows; and the torch plasma is considered to he used as an energy transmitting medium between a flying object and the earth. C o p sequently, it is informed that the study on the properties is of fun damental importance. The torch plasma parameters were studied in detail by applying the high-speed crosswind. The transformation behaviors, plasma voltage, quantity of heat being received by cooling water inside the anode were examined. The plasma length stretched gradually as the crosswind velocity became higher. The higher the current of the torch plasma became, the higher the break velocity of the crosswind became. The higher plasma gas flow rate of the torch plasma made changing rate of the plasma voltage lower at higher crosswind velocity. When the crosswind velocity was under 37m/s, the plasma voltage did not have a difference so much for each plasma gas flow rate, but when it was over 37m/s, the plasma voltage increased dramatically and the higher plasma gas flow rate of the torch plasma had higher maximum plasma voltage. The increase of plasma power by crosswind velocity becomes milder with increasing current, and the substantial change in plasma power that is dependent upon crass-wind velocity is considered due t o the energy loss by cross-wind. Exposing the plasma to the cross-wind little by little, starting from no wind, initially the QonodE, the quantity of heat received by cooling water inside the anode, had a gentle decrease, but as the crosswind velocity increased over the critical value of V,,, crosswind speed, it shifted to a dramatic decrease. The rate of reduction of Qanok for the crosswind velocity becomes slightly lower, so that current becoma higher. The difference of Qsnod. for each plasma gas flow rate is smaller than Q. .for each current. The heat received by cooling water inside the anode under crosswind highly depends on current. And after the plasma voltage increases dramatically because of increase of crosswind, the changing rate of the heat received by cooling water inside the anode depends on plasma gas flow rate.