內混式高溫液態金屬噴嘴的氣動力分析

Gasdynamics of an Internal-Mixing Nozzle for High-Temperature Liquid Metal

10.6124/TAASRC.200512_37(4).09

徐明生(Ming-Shen Sheu)

氣霧法 ； 金屬粉末 ； 噴嘴 ； Atomization ； Metal ； Powder ； Nozzle

中國航空太空學會學刊

37卷4期（2005 / 12 / 01）

349 - 356

繁體中文

The powder was produced with the gas-assist atomization generally. The velocity of the atomization gas is achieved to sonic or supersonic velocity by the application of the C-D channel. A High-temperature Liquid Metal (HLM) nozzle is designed for the atomization of the high-temperature liquid metal. Water is free fall. It is fed near the throat of C-D channel. The atomization gas is confined by the C-D channel of HLM. The aspiration pressure of the liquid channel (Δp), the diameter of the liquid channel orifice (Φ), the pressure of the atomization gas (P(subscript N2)), the distance(δ(subscript t)) between the throat of C-D channel and the tip of the liquid channel, the flowrate of liquid (m L) and the flowrate of atomization gas (mN2) are examined. Result shows that the distance δ(subscript t) must be controlled within the range -1mm≤≤δ(subscript t)≤1mm. And, the aspiration pressure is affected less by Φ. The matters will be asked to pay attention for the melt atomization. Results also display that m N2 increases as δ(subscript t) decreases. However, it varies less as Φ increases. M L increases most as Φ increases. It also be affected obviously by δ(subscript t) as P(subscript N2)＜0.15Mpa but affected less as P(subscript N2)＞0.15Mpa.

The powder was produced with the gas-assist atomization generally. The velocity of the atomization gas is achieved to sonic or supersonic velocity by the application of the C-D channel. A High-temperature Liquid Metal (HLM) nozzle is designed for the atomization of the high-temperature liquid metal. Water is free fall. It is fed near the throat of C-D channel. The atomization gas is confined by the C-D channel of HLM. The aspiration pressure of the liquid channel (Δp), the diameter of the liquid channel orifice (Φ), the pressure of the atomization gas (P(subscript N2)), the distance(δ(subscript t)) between the throat of C-D channel and the tip of the liquid channel, the flowrate of liquid (m L) and the flowrate of atomization gas (mN2) are examined. Result shows that the distance δ(subscript t) must be controlled within the range -1mm≤≤δ(subscript t)≤1mm. And, the aspiration pressure is affected less by Φ. The matters will be asked to pay attention for the melt atomization. Results also display that m N2 increases as δ(subscript t) decreases. However, it varies less as Φ increases. M L increases most as Φ increases. It also be affected obviously by δ(subscript t) as P(subscript N2)＜0.15Mpa but affected less as P(subscript N2)＞0.15Mpa.