1/3スケール水試験装置で実施したジェットポンプ試験の三次元流動解析を汎用コードSTAR-CDを用いて行った。現行の５孔のほかに当社で開発した６孔、リングでも解析は試験とよい一致を示した。

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When planning the thermal environment for an indoor area, it is critical to avoid uneven air flow distributions in the occupied zone and to ensure the conditioned air is uniformly circulated in the room. It is also essential to avoid generating cold drafts that may cause occupants to experience unpleasant chilliness. For these reasons, when air conditioning a large space it is common practice to employ a horizontal supply diffusing device that supplies air parallel to the ceiling from upper sections of the walls. In most horizontal supply diffusing devices, nozzle outlets with air long throw are commonly used. It is important to determine an appropriate supply velocity and an appropriate temperature difference between the nozzle temperature and the occupied zone temperature in order to appropriately control the thermal environment of rooms.
We have proposed a movable nozzle-type supply air outlets method in which the supply direction varies periodically as a means of controlling the terminal velocity in the occupied zone by increasing the diffusion area of the air flow without reducing the throw. A previous report compared the conventional outlet design guideline and the movable nozzle-type supply air outlets method by assuming the outlet is installed on the ceiling. It is confirmed that it is possible to constitute a comfortable occupied zone by adopting the movable nozzle-type supply air outlets to a large room by calculating the air diffusion performance index (ADPI). In the present report, the characteristics of the movable nozzle-type supply air outlets method are analyzed by assuming that the nozzle outlet is on the wall and by using an unsteady simulation based on a CFD simulation. The ADPI is used in the thermal environmental evaluation of the occupied zone in a similar manner as the previous report. However, in this present report, the effect of drafts in the occupied zone is additionally evaluated using the draft rating (DR) that calculates the effect of drafts in the occupied zone based on the air flow velocity and the occupied zone temperature.

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核融合炉材料の研究のためにIFMIF開発が進められており、重陽子ビームのターゲットとして液体金属リチウム流が計画されており、リチウムの自由表 面波動特性の解明は重要である。そこで、大阪大学液体金属リチウム循環ループにおいて、内流動、自由表面流について汎用CFDコードである FLUENTを用いたシミュレーションを実施している。本発表では、LESを用い、内境界層流れが自由表面波形成に与える影響評価について報告す る。内の凹面壁で形成されたゲルトラー渦は、そのまま出口までその構造を維持し、から自由表面流部に吐出していることが分かっている。 また、気液せん断に起因する流れ幅方向に軸を持つ横渦が発生しており、から吐出した縦渦と横渦による自由表面下における3次元的な流動が、高流速条 件で発生するランダムな3次元波の種となっている可能性が示唆されているので、報告する。

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現在開発を進めている原子炉統合解析システムの一構成要素であるセパレータ出口_から_ドライヤ_から_主蒸気部を含む３次元熱流動解析モジュールにより100万kWe級ABWRプラントに採用された主蒸気２本構成と４本の既設ABWR（135万kWe）での主蒸気流動特性の解析評価を行い、影響について検討した。

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In this report, the engine performance were compared by five different diameter of carburetter venturi which are used both for LP Gas fuel and gasoline fuel. Following results were obtained.
(1) At the maximum output, the performance of 20mm diameter venturi was higher than the others on gasoline and LP Gas fuel. Generally, small diameter venturi were not good. The LP Gas fuel and large diameter of venturi were good in the limit of maximum output, and effective range was 6-10PS.
(2) According to the three dimentional curve (solid curve) among output, fuel consumption and venturi diameter, there was no correlation between gasoline and LP Gas fuel, but 22mm and 24mm dia. venturis were good.
(3) On the costs of fuel consumption, 20mm dia. venturi was the cheapest, and large diameter ones were suitable for both fuel. The cost of gasoline was higher than LP Gas fuel by 10yen/PS-hr at the minimum cost of fuel consumption.
(4) On the relation between supreme adequate outputs and costs of fuel consumption on solid curve, the performance was good when the curve has no snake type properties. Therefore the large diameters were surpassing.
(5) On the mixture ratio of fuel and excess air ratio, gasoline was better than LP Gas fuel. Generally, the mixture ratio was high at low output in the case of gasoline and at high output in the case of LP Gas. On all output condition, we wished that gasoline might be used by half load, but LP Gas might be enlarged the all range.
As the result of this report, we found 22mm of venturi diameter was best through every experiments, and LP Gas venturi throat had to be 10% smaller than the air inlet pipe of gasoline engine.

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本研究では内部で生じるキャビテーションが燃料噴霧の微粒化に及ぼす影響の解明を目的とする．本報ではの噴孔長さの変化がキャビテーションおよび噴流挙動に及ぼす影響について検証した．特にキャビテーション末端から放出される気泡群に着目し，噴流の拡がりに対する主たる要因について考察した．

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