The Influence of Anode Inner Contour on Atmospheric DC Plasma Spraying Process

Table 4

The relationship between H₂ content and arc voltage and net power and thermal efficiency (current: 550 A).

Working gas (slpm)		Voltage (V)		Net power (kW)		Thermal efficiency (%)
Ar	H2	Cylindrical	Laval	Cylindrical	Laval	Cylindrical	Laval
68	2	67.3	61.6	21.3	18.2	57.5	53.6
66	4	70.9	68.0	22.4	20.5	57.4	54.8
64	6	74.6	72.6	23.9	22.2	58.2	55.7
62	8	77.3	76.1	24.9	23.5	58.5	56.2
60	10	79.9	79.5	25.6	24.8	58.3	56.7

Note. Total gas flow rate is 70 slpm.