PROCESS OF MEASUREMENT OF MODULUS AND DIRECTION OF VELOCITY VECTOR OF RAREFIED GAS FLOW AND DEVICE FOR ITS IMPLEMENTATION

摘要

FIELD: study of dynamics of gas flows in upper air and in aerodynamic installations. SUBSTANCE: gas is ionized in accelerating electric field. Distribution of current of ions entrained by studied flow is recorded by means of sectionalized ion collector. Portion of gas is isolated from studied gas flow before ionization and electric discharge is initiated in this portion of gas. Beam of ions coaxial and axial to collector is formed and injected to volume of studied flow. Homogeneous accelerating electric field is created along axis of axial symmetry of measurement device. Source of ions is manufactured in the form of axially symmetric gaseous-discharge chamber which side walls and one of end face walls are impenetrable to studied flow. Anode is located on internal surface of mentioned end face wall. Cathode is the other end face wall of chamber and has central hole to form ion beam. Gaseous-discharge chamber is positioned uniaxially to collector. High- voltage source is connected to anode with one lead. Additional voltage source is located between cathode and collector. The other lead of high-voltage source is connected to cathode. EFFECT: increased measurement accuracy. 2 cl, 2 dwg