Wind Tunnel Wall Interferences for a Half-span Aircraft Model Testing with High-Lift Devices

(1)

㧗ᥭຊ⿦⨨༙⿢㢼Ὕヨ㦂࡟࠾ࡅࡿ㢼Ὕቨᖸ΅ࡢᙳ㡪࡟ࡘ࠸࡚

ᮧᒣගᏹᶓᕝㆡ

Ᏹᐂ⯟✵◊✲㛤Ⓨᶵᵓ ⯟✵ࣉࣟࢢ࣒ࣛࢢ࣮ࣝࣉ

⏣୰೺ኴ㑻

⳻཭ࢩࢫࢸ࣒ࢬ ᒣᮏ୍⮧

Ᏹᐂ⯟✵◊✲㛤Ⓨᶵᵓ ⯟✵ࣉࣟࢢ࣒ࣛࢢ࣮ࣝࣉ

ఀ⸨೺

Ᏹᐂ⯟✵◊✲㛤Ⓨᶵᵓ ◊✲㛤Ⓨᮏ㒊

Wind Tunnel Wall Interferences for a Half-span Aircraft Model Testing with High-Lift Devices

by

Mitsuhiro Murayama, Yuzuru Yokokawa, Kentaro Tanaka, Kazuomi Yamamoto, and Takeshi Ito

ABSTRACT

In this paper, wind tunnel wall interferences due to high-lift half-span model testing are investigated in detail to understand the differences between the flows in the wind tunnel and free-air conditions. Three-dimensional flow computations over a half-span wind tunnel testing model of a realistic high-lift aircraft wing-body configuration with a nacelle-pylon tested at JAXA are performed using an unstructured mesh method. Influence of a spacer to avoid interferences between the model and the boundary layer of the bottom wind tunnel wall when the half-span model is mounted vertically on the wind tunnel is investigated in the computations with/without the spacer. Influence of the height of the spacer is estimated by the computations with three heights of the spacer in the free-air conditions with/without the floor boundary layer. The results showed that the spacer and floor boundary layer generated large positive and negative velocity changes in the plane to assume the symmetric condition and changed the effective angle of attack locally near the fuselage. The changes reduced drag especially at high angle of attack and generated the difference of CL-CD curve. Through the investigations, a height of the boundary layer spacer related to the displacement thickness of the floor boundary layer showed less difference with the results in the free-air conditions.

㸯㸬ࡣࡌࡵ࡟

᪑ᐈᶵ㞳╔㝣᫬ࡢ✵ຊᛶ⬟ࡣࠊ࣌࢖࣮ࣟࢻࡸ⇞ᩱᾘ㈝➼ࡢ 㐠⾜㈝࡟኱ࡁ࡞ᙳ㡪ࢆཬࡰࡍࡓࡵࠊ㞳╔㝣᫬࡟ᒎ㛤ࡍࡿ㧗ᥭ ຊ⿦⨨ࡢᛶ⬟ྥୖࡣ㠀ᖖ࡟㔜せ࡞ㄢ㢟࡛࠶ࡿࠋ㏆ᖺࠊᶵయ㦁㡢ࡢపῶࡢほⅬ࠿ࡽࡶࠊ㧗ᥭຊ⿦⨨ࡢ㐺ษ࡞タィࡀồࡵࡽࢀ

࡚࠸ࡿࠋ

㧗ᥭຊ⿦⨨ᒎ㛤ᙧែࡢప㏿㢼Ὕヨ㦂࡛ࡣࠊྍ⬟࡞㝈ࡾࣞ࢖

ࣀࣝࢬᩘࢆ኱ࡁࡃࡍࡿࡓࡵࠊࡋࡤࡋࡤ༙⿢㢼Ὕᶍᆺࢆ⏝࠸ࡓ ヨ㦂ࡀ⾜ࢃࢀࡿࠋ༙⿢㢼Ὕヨ㦂࡛ࡣ㢼Ὕቨቃ⏺ᒙ࡜ᶍᆺᮏయ࡜

ࡢᖸ΅ࢆ㑊ࡅࡿᚲせࡀ࠶ࡾࠊࡑࡢẚ㍑ⓗ⡆౽࡞᪉ἲ࡜ࡋ࡚⬗య࡜㢼 Ὕᗋ㠃ࡢ㛫࡟⬗యᑐ⛠㠃ᙧ≧ࢆᘏ㛗ࡋ࡚࠿ࡉୖࡆࡍࡿቃ⏺ᒙ᤼㝖ᯈ

ࢆタ⨨ࡍࡿ᪉ἲࡀ࠶ࡿࠋ

୍⯡ⓗ࡟኱ࡁ࡞ᥭຊࢆ⏕ࡌࡿ㧗ᥭຊ⿦⨨㢼Ὕヨ㦂ࡣ㢼Ὕ ቨᖸ΅ࡶ኱ࡁࡃ࡞ࡾࠊ㢼Ὕᗋ㠃ቃ⏺ᒙࡢᖸ΅ࡶ኱ࡁࡃ࡞ࡿ࡜

⪃࠼ࡽࢀࡿࡓࡵࠊቃ⏺ᒙ᤼㝖ᯈࡢ㐺ษ࡞㧗ࡉࡢタᐃࡀồࡵࡽ

ࢀࡿࠋᮏⓎ⾲࡛ࡣቃ⏺ᒙ᤼㝖ᯈࢆ⪃៖ࡋࡓᩘ್ゎᯒ࡟ࡼࡾࠊ

༙⿢㢼ヨ࡟࠾ࡅࡿቃ⏺ᒙ᤼㝖ᯈࡢᙳ㡪࡜᭱㐺࡞᤼㝖ᯈ㧗ࡉ

࡟㛵ࡍࡿㄪᰝ⤖ᯝࢆሗ࿌ࡍࡿࠋ

㸰㸬ィ⟬᮲௳ཬࡧᩘ್ィ⟬ἲ

ᅗ1࡟♧ࡉࢀ࡚࠸ࡿ2005ᖺ10᭶㹼2006ᖺ2᭶ࡢ㛫࡟JAXA 6.5mu5.5mప㏿㢼Ὕ࡟࠾࠸࡚ヨ㦂ࡀᐇ᪋ࡉࢀࡓJAXA㧗ᥭຊ⿦⨨༙⿢

㢼Ὕᶍᆺ╔㝣ᙧែ^(1-3)ࢆᑐ㇟࡜ࡋ࡚ゎᯒࢆ⾜ࡗࡓࠋ༙ࢫࣃࣥ㛗ࡣ2.3m

࡛࠶ࡿࠋィ⟬᮲௳ࡣ୺ὶ࣐ࢵࣁᩘ0.175(|㢼㏿60m/s)ࠊMACᇶ

‽ࣞ࢖ࣀࣝࢬᩘ2.1u10⁶࡛࠶ࡿࠋ

୍ᵝὶ୰࡟࠾࠿ࢀࡓゎᯒ࡟ຍ࠼ࠊ᤼㝖ᯈ㧗ࡉ࡜ᗋ㠃ቃ⏺

ᒙࡢᙳ㡪ࢆ⡆౽࡟ㄪ࡭ࡿࡓࡵ࡟ࠊᅗ2࡟♧ࡉࢀࡿィ⟬᱁Ꮚࢆ

⏝࠸ࡓゎᯒࢆ⾜ࡗࡓࠋ㢼Ὕቨࡣ⪃៖ࡏࡎ୍ᵝὶ୰ࡢゎᯒ࡟

ቃ⏺ᒙ᤼㝖ᯈࢆ㏣ຍࡋࠊᑐ⛠㠃ୖ࡟㢼Ὕᗋ㠃ቃ⏺ᒙ࡟┦ᙜ ࡍࡿቃ⏺ᒙࡀ↓࠸ሙྜ࡜࠶ࡿሙྜࡢゎᯒࢆ⾜ࡗࡓࠋቃ⏺ᒙ ࡀ࠶ࡿሙྜ࡟ࡣᅗ2(a)ࡢ㡿ᇦAࡢሙᡤࢆࡍ࡭ࡾ↓ࡋቨ࡜ࡋ࡚

ྲྀࡾᢅ࠸ࠊ᮲௳࡟࠶࠺ཌࡉࡢቃ⏺ᒙࢆⓎ㐩ࡉࡏ࡚࠸ࡿࠋ࡞

࠾ࠊᗋ㠃ቃ⏺ᒙ↓ࡢィ⟬࡛ࡣ㡿ᇦAࡶࡍ࡭ࡾቨ࡜ࡋ࡚ྲྀࡾᢅ

࠺ࠋ

㢼ヨ࡛ࡣ㢼㏿30m/s᫬ࡢ㢼Ὕቨ㠃ࡢቃ⏺ᒙ99%ཌࡉ⛬ᗘࢆ

㑊ࡅࡿࡓࡵ࡟㧗ࡉ150mmࡢ᤼㝖ᯈࡀタ⨨ࡉࢀ࡚࠸ࡿࠋࡲࡓࠊ ᶵయ࡜᤼㝖ᯈࡢ㛫࡟ࡣ10mmࡢ㝽㛫ࡀ࠶ࡾࠊࡑࡢ㝽㛫ࡣ✵Ẽ ࡀὶࢀࡇࡲ࡞࠸ࡼ࠺࡟ᰂẟᮦ࡟ࡼࡾࢩ࣮ࣝࡉࢀ࡚࠸ࡿࠋ௒

ᅇࡢゎᯒ࡛ࡣࠊᶵయ࡜᤼㝖ᯈࡢ㝽㛫ࢆྵࡵࡓ160mmࠊࡑࡢ

(2)

༙ศࡢ80mmࠊቃ⏺ᒙ᤼㝖ཌ⛬ᗘࡢ30mmࡢ3✀㢮ࡢ᤼㝖ᯈ㧗 ࡉ࡟ᑐࡍࡿィ⟬ࢆ⾜ࡗࡓࠋ

ィ⟬᱁Ꮚࡣ⥲᱁ᏊⅬᩘ⣙600୓Ⅼࡢ㠀ᵓ㐀ࣁ࢖ࣈࣜࢵࢻ᱁ Ꮚ࡛ࠊFTFཬࡧࢫࣛࢵࢺᨭᣢ㔠ල➼ࡣ┬࠿ࢀ࡚࠸ࡿࠋቃ⏺ᒙ

᤼㝖ᯈ᭷ࡾࡢィ⟬᱁Ꮚࡣ᤼㝖ᯈ↓ࡋࡢ᱁Ꮚ࡟ᑐࡋ࡚᤼㝖ᯈ ศࡢ᱁Ꮚࢆ㏣ຍࡋ࡚⏕ᡂࡋ࡚࠸ࡿࠋቃ⏺ᒙ᤼㝖ᯈࡣᶍᆺྠᵝ ࡍ࡭ࡾ↓ࡋቨ࡜ࡋ࡚ィ⟬ࢆ⾜ࡗࡓࠋ

CFDࢥ ࣮ ࢻ ࡜ ࡋ ࡚ ࢭ ࣝ ⠇ Ⅼ ᭷ 㝈 య ✚ ἲ 㠀 ᵓ 㐀 ᱁ ᏊTAS

code^(4-7)ࢆ⏝࠸ࠊ⢓ᛶὶゎᯒࢆ⾜ࡗࡓࠋὶ᮰ホ౯࡟ࡣHLLEW

ἲࢆ⏝࠸ࠊU-MUSCLἲ࡟ࡼࡾ㧗ḟ⢭ᗘ໬ࢆ⾜࠸ࠊ᫬㛫✚ศ

࡟ࡣLU-SGS㝜ゎἲࢆ⏝࠸ࡓࠋ஘ὶࣔࢹࣝ࡟ࡣࠊ ୰ᚰ㡿ᇦࡢ㐣

኱࡞ ⢓ᛶࡢ⏕ᡂࢆῶࡽࡍࠊಟṇSpalart-Allmaras 㸯᪉⛬ᘧࣔࢹࣝࢆ

⏝࠸ࡓࠋ

ᅗ1 JAXA㧗ᥭຊ⿦⨨㢼Ὕᶍᆺ

(a) ィ⟬㡿ᇦ඲యᅗ

(b) ቃ⏺ᒙ᤼㝖ᯈ↓ (c) ቃ⏺ᒙ᤼㝖ᯈ(160mm)௜

ᅗ2 JAXA㧗ᥭຊ⿦⨨㢼Ὕᶍᆺ࡟ᑐࡍࡿࣁ࢖ࣈࣜࢵࢻ㠀ᵓ㐀

ィ⟬᱁Ꮚ

㸱㸬ィ⟬⤖ᯝ

ᅗ3࡟ᥭຊ㸫᢬ᢠಀᩘ(CL-CD)≉ᛶᅗࢆ♧ࡍࠋቃ⏺ᒙ᤼㝖ᯈ

࡟ാࡃຊࡣ㝖እࡋ࡚࠸ࡿࠋቃ⏺ᒙ᤼㝖ᯈ㧗ࡉࡢቑຍ࡟క࠸C_D ࡀῶᑡࡋࠊC_Lࡀቑຍࡍࡿഴྥࡀぢࡽࢀࡿࠋࡲࡓࠊ㏄ゅࡢቑຍ

࡟క࠸CDࡢῶᑡ㔞ࡀ኱ࡁࡃ࡞ࡾࠊCL-CD᭤⥺ࡀ᤼㝖ᯈ㧗ࡉࡢ ቑຍ࡟ࡘࢀ࡚㛤ࡃഴྥࡀぢࡽࢀࡿࠋᗋ㠃ቃ⏺ᒙ᭷(ᅗ୰ࡢ +BL)࣭↓ࡢ⤖ᯝࢆẚ㍑ࡍࡿ࡜ࠊ࠸ࡎࢀࡢ᤼㝖ᯈ㧗ࡉ࡟࠾࠸࡚

ࡶᗋ㠃ቃ⏺ᒙ᭷ࡢ⤖ᯝࡢ᪉ࡀCDࡢῶᑡ㔞࡜CLࡢቑຍ㔞ࡀᑠ ࡉ࠸ࠋ᤼㝖ᯈ㧗ࡉ30mmࡢ⤖ᯝࡣ୍ᵝὶ୰ࡢ⤖ᯝ࡜ࡢᕪࡀᑠ ࡉ࠸ࠋ

ᅗ3 ᥭຊ㸫ᢠຊ≉ᛶC_L-CD

ᅗ4࡟ ㏄ゅ10ᗘ ࡟ ࠾ ࡅ ࡿ ⾲㠃 ᅽ ຊ ಀ ᩘCpศ ᕸ ࢆ ♧ ࡍ ࠋ

K=0.56ࡢእ⩼ഃ࡛ࡣ᤼㝖ᯈ㧗ࡉ࡟ࡼࡿᕪࡣᑠࡉ࠸ࡀࠊ⬗య࡟

㏆࠸ෆ⩼ഃ࡛ࡣࠊ᤼㝖ᯈ㧗ࡉࡢቑຍ࡟క࠸ࢫࣛࢵࢺཬࡧ୺⩼

ࡢࢧࢡࢩࣙࣥࣆ࣮ࢡࡀ㧗ࡃ࡞ࡗ࡚࠸ࡿࠋᗋ㠃ቃ⏺ᒙ᭷(ᅗ୰ࡢ +BL)࣭↓ࡢẚ㍑࡛ࡣᗋ㠃ቃ⏺ᒙ᭷ࡢ᪉ࡀࢧࢡࢩࣙࣥࣆ࣮ࢡࡢ ቑຍ㔞ࡀᑠࡉ࠸ࡀࠊྠᵝࡢഴྥࡀぢࡽࢀࡿࠋᅽຊศᕸ࡟࠾࠸

࡚ࡶ᤼㝖ᯈ㧗ࡉ30mmࡢ⤖ᯝࡣ୍ᵝὶ୰ࡢ⤖ᯝ࡜ࡢᕪࡀᑠࡉ

࠸ࠋᅗ5࡟ෆ⩼ഃK=0.25࡟࠾ࡅࡿ᤼㝖ᯈ㧗ࡉ160mmࡢ㏄ゅ10 ᗘࡢCpศᕸィ⟬⤖ᯝ࡟㛵ࡋ࡚ࠊ࠸ࡃࡘ࠿ࡢ㏄ゅࡢ㢼ヨ⤖ᯝ࡜

ࡢẚ㍑ࢆ♧ࡍࠋ㏄ゅ࡟క࠺㢼ヨᅽຊศᕸࡢኚ໬࡜ẚ㍑ࡍࡿ࡜ࠊ ෆ⯨ഃࡢࢫࣛࢵࢺ࡜ẕ⩼࡟㛵ࡋ࡚᤼㝖ᯈ㧗ࡉ160mmࡢሙྜࠊ

⣙1ᗘᒁᡤ㏄ゅࡀቑຍࡋ࡚࠸ࡿ஦ࡀ♧ࡉࢀ࡚࠸ࡿࠋ

ᅗ6࡟㏄ゅ10ᗘ࡟࠾ࡅࡿ᢬ᢠᡂศࡢẚ㍑ࢆ♧ࡍࠋCD, CDp, CDf,CDiࡣࡑࢀࡒࢀࠊ඲᢬ᢠࠊᅽຊ᢬ᢠࠊᦶ᧿᢬ᢠࠊ⌮᝿ㄏᑟ

᢬ ᢠ ࢆ ♧ ࡋ ࡚ ࠸ ࡿ ࠋ ࡇ ࡇ ࡛ ⌮ ᝿ ㄏ ᑟ ᢬ ᢠ ࡣ ⡆ ᫆ ⓗ ࡟ CDi=CL2

/(AR*S)࡜ࡋ࡚ぢ✚ࡶࡗ࡚࠸ࡿࠋࡲࡓᅗ7࡟㏄ゅ10ᗘ࡟

࠾ࡅࡿྛࢥ࣏࣮ࣥࢿࣥࢺࡢ᢬ᢠಀᩘẚ㍑ࢆ♧ࡍࠋ᤼㝖ᯈࡢᏑ ᅾ࡟ࡼࡿ᢬ᢠኚ໬࡟㛵ࡋ࡚ࠊᦶ᧿᢬ᢠࡢኚ໬ࡣᅽຊ᢬ᢠࡢኚ

໬࡜ẚ࡭࡚┦ᑐⓗ࡟ᑠࡉࡃࠊᅽຊ᢬ᢠࡢኚ໬ࡀ୺せᅉ࡜࡞ࡗ

࡚࠸ࡿࠋ඲᢬ᢠ࠿ࡽ⌮᝿ㄏᑟ᢬ᢠࢆᘬ࠸ࡓ⤖ᯝ࡛ẚ㍑ࡍࡿ࡜ࠊ

୍ᵝὶࡢ⤖ᯝ࡜ẚ㍑ࡋ࡚᤼㝖ᯈ㧗ࡉ30mm࡛⣙20࢝࢘ࣥࢺ㸦1

࢝࢘ࣥࢺ=10^-4㸧ࠊ160mm࡛210࢝࢘ࣥࢺῶᑡࡋ࡚࠸ࡿ஦ࡀࢃ

࠿ࡿࠋ࡞࠾ࠊ᤼㝖ᯈ㧗ࡉࡢቑຍ࡟క࠺᢬ᢠῶᑡࡣ≉࡟ࢫࣛࢵ

Spacer

㡿ᇦA

(3)

ࢺ࡜࢔ࣇࢺࣇࣛࢵࣉࠊ⬗య࡟࠾࠸࡚኱ࡁ࠸ࠋෆ⩼ഃࡢᒁᡤⓗ

࡞᭷ຠ㏄ゅࡢቑຍ࡟ࡼࡿ๓⦕㏆ഐࡢࢧࢡࢩࣙࣥࡢቑຍ࡟క

࠸ࠊ㈇ࡢ᢬ᢠᡂศࡀ኱ࡁࡃ࡞ࡾࠊ᢬ᢠࡀῶᑡࡋ࡚࠸ࡿ࡜⪃࠼

ࡽࢀࡿࠋ

(a)K=0.16

(b)K_=0.16 ࢫࣛࢵࢺཬࡧ୺⩼ࢧࢡࢩࣙࣥࣆ࣮ࢡ㏆ഐᣑ኱ᅗ

(c)K_=0.56

ᅗ4 ㏄ゅ10ᗘ࡟࠾ࡅࡿ⾲㠃ᅽຊಀᩘCpศᕸ

ᅗ5 K_=0.25࡟࠾ࡅࡿ㢼ヨ⾲㠃ᅽຊಀᩘCpศᕸ࡜ࡢẚ㍑

ᅗ6 ㏄ゅ10ᗘ࡟࠾ࡅࡿ᢬ᢠಀᩘẚ㍑㸦CD㸸඲᢬ᢠࠊ CDp㸸ᅽຊ᢬ᢠࠊCDf㸸ᦶ᧿᢬ᢠࠊCDi㸸⌮᝿ㄏᑟ᢬ᢠ㸧

ᅗ7 ㏄ゅ10ᗘ࡟࠾ࡅࡿྛࢥ࣏࣮ࣥࢿࣥࢺ᢬ᢠಀᩘẚ㍑

ᅗ8㹼10࡟ྛቃ⏺ᒙ᤼㝖ᯈ㧗ࡉ࡟࠾ࡅࡿ᤼㝖ᯈ࡜ᶵయࡀ᥋

ྜࡍࡿࢫࣃࣥ఩⨨࡛ࡢࢫࣃࣥ᪉ྥ㸦ṇ㸸እ⩼࡟ྥ࠿࠺᪉ྥ㸧

࣐ࢵࣁᩘศᕸࢆ♧ࡍࠋᅗ11࡟᤼㝖ᯈ㧗ࡉ160mmࡢ⤖ᯝ࡟࠾ࡅ

ࡿ⾲㠃ὶ⥺ࢆ♧ࡍࠋࡲࡓࠊẚ㍑ࡢࡓࡵࠊ㢼Ὕቨࡶྵࡵࡓ㢼Ὕ ෆ࡟࠾ࡅࡿゎᯒࢆ⾜ࡗࡓ㏄ゅ10ᗘࡢ⤖ᯝࢆ♧ࡍࠋᅗ12࡟㢼Ὕ ෆ࡟࠾ࡅࡿゎᯒ୰࡟࠾࠸࡚ᶍᨃࡋࡓ㢼Ὕ㡿ᇦࢆ♧ࡍࠋ㞟ྜ⬗ࠊ

⦰ὶ⬗ࠊࡑࡋ࡚࣐࣋ࣝ࢘ࢫ┤๓ࡢ ᐃ㒊ࡲ࡛ࢆᶍᨃࡋ࡚࠸ࡿࠋ ᅗ13࡟⏝࠸ࡓィ⟬᱁Ꮚࢆ♧ࡍࠋィ⟬࡟࠾ࡅࡿቃ⏺᮲௳࡜ࡋ࡚ࠊ

ୖὶࡢቃ⏺᮲௳ࡣ㞟ྜ⬗ࡢ᭱ୖὶ఩⨨࡟࡚⥲ ࡜⥲ᅽࢆᅛ ᐃࡋࠊ࣐ࢵࣁᩘࢆእᤄࡋ࡚࠸ࡿࠋࡲࡓࠊୗὶࡢቃ⏺᮲௳ࡣ ᐃ㒊ࡢ᭱ୗὶࡢ఩⨨࡟࡚㟼ᅽࢆᅛᐃࡋࠊࡑࡢ௚ࡢ≀⌮㔞ࡣእ ᤄࡋ࡚࠸ࡿࠋୗὶࡢቃ⏺᮲௳࡜ࡋ࡚୚࠼ࡿ㟼ᅽࡣࠊ㢼Ὕヨ㦂

୰࡟㏿ᗘࢆィ ࡋ࡚࠸ࡿࣆࢺ࣮⟶఩⨨࡟࡚ᣦᐃࡋࡓ࠸࣐ࢵ

ࣁᩘ࡟࡞ࡿࡼ࠺࡟ィ⟬୰࡛ㄪᩚࢆ⾜ࡗ࡚࠸ࡿࠋᅗ14࡟᤼㝖ᯈ

࡜ᶵయࡀ᥋ྜࡍࡿࢫࣃࣥ఩⨨࡛ࡢࢫࣃࣥ᪉ྥࡢ࣐ࢵࣁᩘศ ᕸ♧࡜⾲㠃ὶ⥺ࡢィ⟬⤖ᯝࢆ♧ࡍࠋᅗ8࡜ᅗ11ࡢ᤼㝖ᯈ㧗ࡉ

(4)

160mm࡟࠾ࡅࡿᗋ㠃ቃ⏺ᒙ᭷ࡢ⤖ᯝ࡜ᅗ14ࡢ㢼Ὕቨࡶ⪃៖

ࡋࡓ⤖ᯝࢆẚ㍑ࡍࡿ࡜ࠊ⾲㠃ὶ⥺࡜ࢫࣃࣥ᪉ྥ㏿ᗘศᕸࡀඹ

࡟Ⰻࡃ୍⮴ࡋ࡚࠸ࡿ஦ࡀࢃ࠿ࡾࠊ௒ᅇ⏝࠸ࡓ⡆᫆ⓗ࡞ィ⟬࡛

ࡶጇᙜ࡞᳨ウࡀ࡛ࡁ࡚࠸ࡿ஦ࡀࢃ࠿ࡿࠋ

ᗋ㠃ቃ⏺ᒙ᭷࣭↓᫬ࡢὶࢀሙࡢẚ㍑ࢆ⾜࠺ࠋᗋ㠃ቃ⏺ᒙࡀ

࠶ࡿሙྜࡣ⬗యඛ➃㏆ഐ࠿ࡽ㤿㋟ ࡀⓎ⏕ࡋ࡚࠸ࡿᵝᏊࡀ

ࢃ࠿ࡿࠋࢫࣃࣥ᪉ྥ࣐ࢵࣁᩘศᕸࢆẚ㍑ࡍࡿ࡜ࠊᗋ㠃ቃ⏺ᒙ

↓ࡋࡢሙྜ࡟ࡣ๓⬗ୗ㠃ഃ࡛኱ࡁ࡞ṇࡢ㏿ᗘศᕸࠊ๓⬗ୖ㠃

ഃ࡛㈇ࡢ㏿ᗘศᕸࡀ⏕ࡌ࡚࠸ࡿ஦ࡀࢃ࠿ࡿࠋᗋ㠃ቃ⏺ᒙࢆ⪃

៖ࡋࡓሙྜࠊ㤿㋟ ࡢᙳ㡪ࡶ࠶ࡾࠊࡇࡢ㏿ᗘᡂศࡀᙅࡲࡾࠊ

ࡲࡓࠊᚋ⬗ୗ㠃ഃࡢ㈇ࡢ㏿ᗘᡂศࡀᏑᅾࡍࡿ㡿ᇦࡀ⌧ࢀ࡚࠸

ࡿࠋ᤼㝖ᯈࢆタ⨨ࡍࡿ㝿࡟ࠊ᤼㝖ᯈ࡜ᶵయࡀ᥋ྜࡍࡿࢫࣃࣥ

఩⨨࡛ᑐ⛠ቃ⏺࡜࡞ࡿ஦ࢆ௬ᐃࡋ࡚࠸ࡿࡀࠊࡇࡢṇ࣭㈇ࡢࢫ

ࣃࣥ᪉ྥ㏿ᗘศᕸࡀෆ⩼ഃ࡛ࡢCpศᕸࡢᕪࡸ᢬ᢠᕪࡢཎᅉ

࡜࡞ࡗ࡚࠸ࡿࠋ

ቃ⏺ᒙ᤼㝖ᯈ㧗ࡉ࡟ࡼࡿኚ໬ࢆㄪ࡭ࡿ࡜ࠊࣞ࣋ࣝࡣ␗࡞ࡿ

ࡀࡍ࡭࡚ࡢ᤼㝖ᯈ㧗ࡉ࡟࠾࠸࡚ྠᵝࡢࢫࣃࣥ᪉ྥ࣐ࢵࣁᩘ

ศᕸࡀぢࡽࢀࡿࠋቃ⏺ᒙ᤼㝖ᯈࡢ㧗ࡉࡀቑຍࡍࡿ࡟క࠸ࠊࢫ

ࣃࣥ᪉ྥࡢ㏿ᗘኚ໬ࡀ኱ࡁࡃ࡞ࡾࠊຊࡢኚ໬㔞ࡶ኱ࡁࡃ࡞ࡗ

࡚࠸ࡿࠋ᤼㝖ᯈ㧗ࡉ30mmࡢቃ⏺ᒙ᤼㝖ཌ⛬ᗘࡢሙྜ࡟ࡣࢫ

ࣃࣥ᪉ྥ㏿ᗘኚ໬ࡣᑠࡉࡃࠊࡑࡢࡓࡵ୍ᵝὶ୰ࡢ⤖ᯝ࡜ࡢᕪ ࡀᑠࡉ࠸࡜⪃࠼ࡽࢀࡿࠋ

(a) 㢼Ὕᗋ㠃ቃ⏺ᒙ↓

(b) 㢼Ὕᗋ㠃ቃ⏺ᒙ᭷

ᅗ8 ᗋ㠃࠿ࡽ160mm఩⨨࡟࠾ࡅࡿࢫࣃࣥ᪉ྥ㸦ṇ㸸እ⩼࡟

ྥ࠿࠺᪉ྥ㸧࣐ࢵࣁᩘศᕸ㸦᤼㝖ᯈ㧗ࡉ160mm㸧

ᅗ9 ᗋ㠃࠿ࡽ80mm఩⨨࡟࠾ࡅࡿࢫࣃࣥ᪉ྥ㸦ṇ㸸እ⩼࡟ྥ

࠿࠺᪉ྥ㸧࣐ࢵࣁᩘศᕸ㸦᤼㝖ᯈ㧗ࡉ80mm㸧

ᅗ10 ᗋ㠃࠿ࡽ30mm఩⨨࡟࠾ࡅࡿࢫࣃࣥ᪉ྥ㸦ṇ㸸እ⩼࡟

ྥ࠿࠺᪉ྥ㸧࣐ࢵࣁᩘศᕸ㸦᤼㝖ᯈ㧗ࡉ30mm㸧

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ᅗ11 ㏄ゅ10ᗘ࡟࠾ࡅࡿ⾲㠃ὶ⥺ẚ㍑㸦᤼㝖ᯈ㧗ࡉ160mm㸧

Computational domain

Settling chamber

Contraction nozzle Test section Bell mouth Computational domain

Settling chamber

Contraction nozzle Test section Bell mouth

ᅗ12 JAXA 6.5mu 5.5m ప㏿㢼Ὕෆ࡟࠾ࡅࡿゎᯒ୰࡟࠾࠸࡚

ᶍᨃࡋࡓ㢼Ὕ㡿ᇦ㸸㞟ྜ⬗ࠊ⦰ὶ⬗ࠊィ ᐊ

ᅗ13 㢼Ὕෆィ⟬᱁Ꮚ

(a) ᗋ㠃࠿ࡽ160mm఩⨨࡟࠾ࡅࡿࢫࣃࣥ᪉ྥ㸦ṇ㸸እ⩼࡟ྥ

࠿࠺᪉ྥ㸧࣐ࢵࣁᩘศᕸ

(b) ⾲㠃ὶ⥺

ᅗ14 ㏄ゅ10ᗘ࡟࠾ࡅࡿ㢼Ὕቨࡶ⪃៖ࡋࡓゎᯒ⤖ᯝ

㸲㸬ࡲ࡜ࡵ

ቃ⏺ᒙ᤼㝖ᯈࢆ⪃៖ࡋࡓᩘ್ゎᯒ࡟ࡼࡾࠊ༙⿢㢼ヨ࡟࠾ࡅ

ࡿቃ⏺ᒙ᤼㝖ᯈࡢᙳ㡪࡜᭱㐺࡞᤼㝖ᯈ㧗ࡉ࡟㛵ࡍࡿㄪᰝࢆ

⾜ࡗࡓࠋ

᤼㝖ᯈ㧗ࡉࡀቃ⏺ᒙ᤼㝖ཌ࡜ẚ㍑ࡋ࡚㧗ࡍࡂࡿሙྜࠊቃ⏺

ᒙ᤼㝖ᯈ࡜ᗋ㠃ቃ⏺ᒙ࡟ࡼࡾࠊᑐ⛠㠃ࢆ௬ᐃࡋ࡚࠸ࡿ఩⨨࡟

኱ࡁ࡞ṇ࣭㈇ࡢ㏿ᗘศᕸࡀ⏕ࡌࠊ⬗య㏆ࡃࡢෆ⩼ഃ࡛ࡢ᭷ຠ

㏄ゅࡢቑຍ࡜᢬ᢠῶᑡຠᯝࢆᘬࡁ㉳ࡇࡋ࡚࠸ࡿ஦ࡀ♧ࡉࢀ

ࡓࠋࡲࡓࠊ᤼㝖ᯈ㧗ࡉ࡜ࡋ࡚ቃ⏺ᒙ᤼㝖ཌ⛬ᗘࢆ㑅ࡪ࡜ᅽຊ ศᕸࡸ✵ຊಀᩘ࡬୚࠼ࡿᙳ㡪ࡀᑠࡉ࠸஦ࡀ♧ࡉࢀࡓࠋ

ཧ⪃ᩥ⊩

1) Ito, T., et. al, “High-Lift Device Testing in JAXA 6.5mu5.5m Low-speed Wind Tunnel,” AIAA Paper 2006-3643, June 2006.

2) Yokokawa, Y. et. al. Murayama, M., Ito, T., and Yamamoto, K., “Experimental and CFD of a High-Lift Configuration Civil Transport Aircraft Model,” AIAA Paper 2006-3452, June 2006.

3) Murayama, M., Yokokawa, Y., Yamamoto, K., and Ueda, Y.,

“CFD Validation Study for a High-Lift Configuration of a Civil Aircraft Model”, AIAA Paper 2007-3924, June 2007.

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4) Nakahashi, K., Togashi, F., Fujita, T., and Ito, Y., “Numerical Simulations on Separation of Scaled Supersonic Experimental Airplane from Rocket Booster at Supersonic Speed,” AIAA Paper 2002-2843, June 2002.

5) Murayama, M. and Yamamoto, K., “Comparison Study of Drag Prediction for the 3rd CFD Drag Prediction Workshop by Structured and Unstructured Mesh Method,” AIAA Paper 2007-0258, Jan. 2007.

6) Ito, Y. and Nakahashi, K., “Surface Triangulation for Polygonal Models Based on CAD Data,” International Journal for Numerical Methods in Fluids, Vol. 39, Issue 1, 2002, pp. 75-96.

7) Ito, Y. and Nakahashi, K., “Improvements in the Reliability and Quality of Unstructured Hybrid Mesh Generation,”

International Journal for Numerical Methods in Fluids, Vol. 45, Issue 1, May 2004, pp. 79-108.