High Temperature Hypersonic Flow Field Around Basic-Shape Biodies and The Metal Component Alterationin

基本形生物体周围高温高超声速流场及金属成分变化

• 批准号: 10650176
• 负责人: KAWAZOE Hiromitsu
• 金额: $ 2.18万
• 依托单位: Tottori University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10650176/
• 关键词: High temperature flow; Hypersonic; Component alteration; Aerodinamics; Basic-shape body; Spectoscopic measurement; Drag coefficient; 高エンタルピー; 高温; 超音速; アークプラズマ; 力天秤; 高エンタルビ

The objectives of the research are to study flow characteristics around a basic-shape body in high temperature hypersonic flow field, to obtain the aerodynamic force acted on the model, and to investigate the metal component alteration of the model owing to the high temperature for developing new materials or disposal of such a difficult-treatment material as an injection needle. Three type of basic-shape bodies, a disc, a hemisophere and an ogive cylinder were exposed to the flow of the arc-plasma wind tunncl which was made for the research, and the flow fields were examined by a spectroscopic measeurement. The alloy ingredient alteration of the models made by brass or stainless steel were also investigated by an electron probe microanalyzer (EPMA) along the model surface. On the other hand, a compact inexpensive force balance was made to measure the drag of the basic-shape bodies in the plasma flow and the drag coeflients were deduced.The temperature near the stagnation point of the … More disc and hemisophere models were calculated to be 3,500 K from the results of the Boltzman plots, which is a little bit lower than that we expected, that is 4,000 K.The number densities of the neutral and ionized argon atoms along the stagnation line in the cases of the disc and hemisophere models were drastically increased just in the front of the stagnation point. Then, the densities of the neutral argon atoms decreased towards the stagnation point on the contrary to the ionized results, since the neutral argons were converted to ionized ones due to extreamely high temperature near the stagnation point. On the other hand, the variation of the number density of the ogive cylinder was almost constant upstream of the stagnation point simillar to the result of the no-model flow.The alloy ingredient alteration of the disc and hemisophere bodies were inversely changed from the initial component of zinc and copper on the front-side surface, that is zinc was increased and vice versa for copper. It could be explained from the point of the high diffusivity of zinc compared with copper and the flow field in front of the models with the existence of the stagnation. It was also found that the drag coefficients for these models in the case of the high enthalpy flow might be smaller than those in the no-plasma flow case. Their details and the reason should be investigated in the next stage research. Farthermore, these data mentioned above will take a part in the varidation data for numerical simulation programs in near future. Less

研究目的是研究高温高超声速流场中基本形体周围的流动特性，获得作用在模型上的气动力，并研究高温对模型金属成分的改变，以开发新材料或处理注射针等难处理材料。将圆盘、半球体和尖圆柱体三种基本形状体置于为研究而制作的弧等离子体风洞的流动中，并通过光谱测量来检查流场。还通过电子探针显微分析仪（EPMA）沿模型表面研究了黄铜或不锈钢模型的合金成分变化。另一方面，制作了一个紧凑、廉价的力天平来测量等离子流中基本形体的阻力，并推导了阻力系数。根据玻尔兹曼图的结果计算出圆盘和半球模型驻点附近的温度为3,500 K，这比我们预期的4,000 K要低一些。中性和电离氩的数密度 在圆盘和半球模型的情况下，沿着停滞线的原子在停滞点的前面急剧增加。然后，中性氩原子的密度朝着驻点降低，与电离结果相反，因为中性氩由于驻点附近的极高温度而转化为电离原子。另一方面，与无模型流动的结果类似，在驻点上游，尖形圆柱体的数密度变化几乎恒定。圆盘和半球体的合金成分变化与前侧表面锌和铜的初始成分相反，即锌增加，铜反之亦然。这可以从锌相对于铜的高扩散率以及模型前面的流场存在停滞点来解释。还发现这些模型在高焓流情况下的阻力系数可能小于无等离子体流情况下的阻力系数。其具体情况及原因应在下一阶段的研究中进行调查。而且，上述这些数据将在不久的将来成为数值模拟程序的修改数据。较少的

项目成果

加古真也,川添博光 他1名: "超音速アルゴンプラズマ流による合金の組成変化とその流れ解析-真鍮およびステンレス円板の場合-"日本航空宇宙学会第31期年会講演会講演集. 295-298 (2000)

Shinya Kako、Hiromitsu Kawazoe 等 1 人：“超音速氩等离子体流及其流动分析改变合金的成分 - 黄铜和不锈钢盘的案例 -”第 31 届日本航空学会年会论文集。 295-298（2000）

加古真也,川添博光: "小型アークプラズマ風洞の製作"日本機械学会中国四国支部第37期講演会講演論文集. No.995-1. 149-150 (1999)

Shinya Kako、Hiromitsu Kawazoe：“小型电弧等离子体风洞的制造”日本机械工程师学会中国-四国分会第 37 届年会论文集，第 995-150 号。

加古真也,川添博光: "円板まわりの高エンタルピー流と表面改質について"日本機械学会第77期流体工学部門講演会講演論文集. No.99-19. 79-80 (1999)

Shinya Kako、Hiromitsu Kawazoe：“关于圆盘周围的高焓流动和表面改性”日本机械工程师学会第 77 届流体工程分会论文集第 99-19 号（1999 年）。

頼金敏昭,川添博光,刀根康剛: "地面近傍でピッチング運動するデルタ翼周りの流れ解析"日本機械学会中四国支部第38期総会講演会講演論文集. No.005-1. 137-138 (2000)

Toshiaki Yorikane、Hiromitsu Kawazoe、Yasutaka Tone：“近地俯仰的三角翼周围的流动分析”日本机械工程师学会中国-四国分会第 38 届会议记录第 137-138 号。 (2000)

H.Kawazoe and S.Kako: "Characteristics of Hypersonic Plasma Flow Around Metal Disk and The Alloy Ingredient Alteration"AIAA Paper. No.2001-0896. 1-10 (2001)

H.Kawazoe 和 S.Kako：“金属盘周围高超声速等离子流的特性及合金成分变化”AIAA 论文。