࠼ࡿᙳ㡪
5.1 ᛶ⬟࣭㦁㡢࠾ࡼࡧෆ㒊ὶࢀሙࡢㄪᰝ
➨
➨ 5 ❶ ࢹࣇ࣮ࣗࢨ㏻㊰ᖜࡀᛶ⬟࣭㦁㡢࠾ࡼ
ࡧෆ㒊ὶࢀሙ࠼ࡿᙳ㡪
๓❶࡛ࡣ㸪ෆ⩚᰿ࡢ๓⦕ᙧ≧ࢆ㐺ษኚᙧࡍࡿࡇࡼࡾⓎ⏕㦁㡢ࡢቑࢆᢚไྍ⬟
࡛࠶ࡿࡇࡀ᫂ࡽ࡞ࡗࡓ㸬≉㸪୕ḟඖࢸ࣮ࣃᙧෆ⩚᰿Type Cࢆ⏝࠸ࡿࡇࡼࡾ㸪
Ⓨ⏕㦁㡢ࣞ࣋ࣝࡢୖ᪼ࢆᢚไࡋࡘࡘ㸪㧗࠸ᅽຊୖ᪼ࡀᚓࡽࢀࡿࡇࡀࢃࡗࡓ㸬ᮏ⠇࡛ࡣ㸪 ࢹࣇ࣮ࣗࢨ㏻㊰ᖜB4ࢆB4 19.55mmࡽB4 26.14mmኚ᭦ࡋ㸪㏻㊰ᖜࡀᛶ⬟࣭㦁㡢࠾
ࡼࡧෆ㒊ὶࢀሙ࠼ࡿᙳ㡪ࡘ࠸࡚ㄪᰝࡍࡿ㸬ࡲࡓ㸪୕ḟඖࢸ࣮ࣃᙧෆ⩚᰿ࡀ㏻㊰ᖜ
ࢆኚ᭦ࡋࡓሙྜ࡛ࡶ᭷ຠ࡛࠶ࡿ࠺ࢆ࠶ࢃࡏ᳨࡚ウࡍࡿ㸬
ᅗ
ᅗ 5.2㏻㊰ᖜࡀⓎ⏕㦁㡢࠼ࡿᙳ㡪
0.1 0.2 0.3
100
Flow Coefficient I 110
120 130
Sound Pressure Level dB
ODV B4= 19.55 mm ODV B4= 26.14 mm VL B4= 19.55 mm Non-dimensional Flow Coefficient I*
0.50 0.75 1.00 1.25
Iopt
ᅗ 5.1 ㏻㊰ᖜࡀᅽ⦰ᶵᛶ⬟࠼ࡿᙳ㡪
0.1 0.2 0.3
0.9 1.0 1.1 1.2 1.3
Flow Coefficient I
Pressure-rise Coefficient\
ODV B4= 19.55 mm ODV B4= 26.14 mm VL B4= 19.55 mm
4.5 % 17 %
Non-dimensional Flow Coefficient I*
0.50 0.75 1.00 1.25
Iopt
5.1.2 ࢹࢹࣇ࣮ࣗࢨෆ㒊ࡢ㏿ᗘሙ࠾ࡼࡧᅽຊሙ
ࢹࣇ࣮ࣗࢨࡢ㏻㊰ᖜࢆᣑࡋࡓᙳ㡪ࡘ࠸࡚ㄪᰝࢆ⾜࠺ࡓࡵ㸪ᩘ್ゎᯒࡼࡾ⩚᰿
㌴ྤฟὶࡘ࠸࡚ㄪᰝࢆ⾜ࡗࡓ㸬ᅗ 5.5 ㏻㊰ᖜࡢኚ᭦ࡀ㸪⩚᰿㌴ྤฟὶࡢࢫࣃࣥ᪉ྥศ ᅗ 5.4 ୧ഃࢸ࣮ࣃᙧෆ⩚᰿ࡀⓎ⏕㦁㡢ཬࡰࡍᙳ㡪
0.1 0.2 0.3
100
Flow Coefficient I 110
120 130
Sound Pressure Level dB
ODV B4= 26.14 mm VL B4= 19.55 mm BTV B4= 26.14 mm 7.5 dB
Non-dimensional Flow Coefficient I*
0.50 0.75 1.00 1.25
Iopt
ᅗ 5.3 ୧ഃࢸ࣮ࣃᙧෆ⩚᰿ࡀᛶ⬟ཬࡰࡍᙳ㡪
0.1 0.2 0.3
0.9 1.0 1.1 1.2 1.3
Flow Coefficient I
Pressure-rise Coefficient\
ODV B4= 26.14 mm VL B4= 19.55 mm BTV B4= 26.14 mm
0.50 0.75 1.00 1.25
Non-dimensional Flow Coefficient I*
Iopt
ࡧI =0.17 ࠾ࡅࡿࢹࣇ࣮ࣗࢨ㏻㊰ᖜB4 19.55mm࠾ࡼࡧB4 26.14mm࠾ࡅࡿࢹࣇ
࣮ࣗࢨෆ㒊ࡢ㏿ᗘศᕸ࠾ࡼࡧᅽศᕸࢆ♧ࡍ㸬
ࢹࣇ࣮ࣗࢨ㏻㊰ᖜB4 = 19.55 mm࡛ࡣ㸪⩚᰿㌴ྤฟὶࡢ༙ᚄ᪉ྥ㏿ᗘࡣࣁࣈഃࡽࢩࣗ
ࣛ࢘ࢻഃࡲ࡛ࢩࣗࣛ࢘ࢻഃ࠾࠸࡚㏿ᗘࡢపୗࡣぢࡽࢀࡿࡶࡢࡢ㸪㏿࠸ὶ㏿ࢆಖࡗ࡚࠸ࡿ
ࡇࡀࢃࡿ㸬
୍᪉㸪B4 = 26.14 mmࡲ࡛ᣑࡍࡿయⓗప㏿࡞ࡿ㸬≉ࣁࣈഃẚࢩࣗࣛ࢘ࢻ
ഃࡢ༙ᚄ᪉ྥ㏿ᗘࡣ㠀ᖖప㏿࡞ࡾ㸪ࢩࣗࣛ࢘ࢻቨ㠃㏆ഐ࡛ࡣὶ㏿ࡀࡰ㸮࡞ࡿ㸬ࡇ ࡢࡼ࠺㸪㐲ᚰᅽ⦰ᶵࡢ≉ᚩ࡛࠶ࡿ⩚᰿㌴ྤฟὶࡢ༙ᚄ᪉ྥࡢ㏿ᗘࡦࡎࡳࡀ㏻㊰ᖜࢆኚ᭦
ࡍࡿࡇࡼࡾࡁࡃ࡞ࡿ㸬ࡇࡢࡓࡵ㸪ື㟼⩼㛫࠾࠸࡚ࡁ࡞ ᗘࡀⓎ⏕ࡍࡿࡔࡅ࡛࡞
ࡃ㸪ࡁ࡞ΰྜᦆኻࡀⓎ⏕ࡍࡿ⪃࠼ࡽࢀࡿ㸬
ḟ㸪ࢹࣇ࣮ࣗࢨෆ㒊ὶࢀሙࡘ࠸࡚ẚ㍑ࢆ⾜࠺㸬ࢹࣇ࣮ࣗࢨ㏻㊰ᖜB4 = 19.55 mm
࡛ࡣෆ⩚᰿ᅽຊ㠃࠾ࡼࡧ㈇ᅽ㠃ࡢࡕࡽഃࡶప㏿ᗘᇦࡀᙧᡂࡉࢀ࡚࠸ࡿࡢᑐࡋ㸪B4 =
26.14 mmࡲ࡛ᣑࡍࡿ㸪 ᅗ 5.6୰A࡛♧ࡍࡼ࠺పὶ㏿ᇦࡀෆ⩚᰿ᚋ➃ࡢࣁࣈഃ
㞟୰ࡍࡿ㸬ࡑࡢࡓࡵ㸪ᅗ 5.7♧ࡍࡼ࠺I 0.24࡛ࡣ㸪ෆ⩚᰿ධཱྀ㏆࡛ࣁࣈഃᏑᅾ ࡍࡿ㧗࠸ᅽࢆ᭷ࡍࡿὶయࡀ⩚᰿㌴ᚋ➃࡛ࡣࢩࣗࣛ࢘ࢻഃ⛣ືࡋ࡚࠸ࡿࡇࡀࢃࡿ㸬 ࡇࡢ⌧㇟ࡣ㸪B4 = 19.55 mm࠾࠸࡚ࡣB4 = 26.14mm㢧ⴭぢࡽࢀ࡞࠸㸬
୍᪉㸪ὶ㔞ࡀపୗࡋࡓI = 0.17࡛ࡣ㸪B4 = 19.55 mm࠾࠸࡚ෆ⩚᰿ᅽຊ㠃࠾ࡼࡧ㈇ᅽ㠃
పὶ㏿ᇦࡀᣑࡋ࡚࠸ࡿࡶࡢࡢ㸪ᅗ 5.7 ♧ࡍࡼ࠺㧗࠸ᅽࡣ⥔ᣢ࡛ࡁ࡚࠸ࡿ㸬୍᪉
࡛㸪B4 = 26.14 mm࠾࠸࡚ࡣ㸪ෆ⩚᰿ࡢᅽຊ㠃ഃࡢ㒊ศࡀపὶ㏿ᇦ࡞ࡗ࡚࠾ࡾ㸪
0 100
20 40 60 80
0
-10 10 20 30 40 50
Velocity m/s
Span from Hub %
B4= 26.14 mm B4= 19.55 mm
ᅗᅗ 5.5 ㏻㊰ᖜࡀ⩚᰿㌴ྤฟὶ࠼ࡿᙳ㡪(II = 0.24, N = 6000 min-1)
࠺㸪B4 = 19.55 mm࡛ࡣࡲࡔྑୗࡀࡾᏳᐃ㡿ᇦ࡛࠶ࡿࡢᑐࡋ㸪B4 = 26.14 mm࡛ࡣ㸪ࡍ࡛
ྑୖࡀࡾᏳᐃ㡿ᇦ࡞ࡗ࡚ࡋࡲࡗ࡚࠸ࡿࡓࡵ࡛࠶ࡿ㸬ࡲࡓ㸪 ᅗ 5.6୰B࡛♧ࡋࡓሙᡤ
࠾࠸࡚㸪పὶ㔞㐠㌿ࡶࢃࡽࡎ㸪ὶయࡀຍ㏿ࡍࡿ㡿ᇦࡀⓎ⏕ࡋ࡚࠸ࡿ㸬ࡇࢀࡣ㸪ᚋ
࡛ヲࡋࡃ㏙ࡿࡀෆ⩚᰿ࡢධཱྀ㒊ෆ⩚᰿㈇ᅽ㠃 ➃ࢆࡶࡘ ࡀࢩࣗࣛ࢘ࢻഃࡽ
࣑ࢵࢻࢫࣃࣥࡅ࡚Ⓨ㐩ࡍࡿࡓࡵ࡛࠶ࡿ㸬ࡑࡢࡓࡵ㸪ࡑࡢ ࡀࣈࣟࢵࢣ࣮ࢪࢆᙧᡂࡍࡿ
ᅗ
ᅗ 5.6 ㏻㊰ᖜࡀᅽ⦰ᶵෆ㒊ࡢ㏿ᗘሙ࠼ࡿᙳ㡪 㸦ODV㸪 II = 0.24㸧 (ii) B4= 26.14 mm
(i) B4= 19.55 mm
I= 0.24 I= 0.17
I= 0.24 I= 0.17
A
0 100
Absolute Velocity m/s
B Hub
L.E.
Hub L.E.
Hub L.E.
Hub L.E.
5.1.3 ࢹࢹࣇ࣮ࣗࢨෆ㒊ὶࢀሙࡢㄪᰝ
ᅗ 5.8࠾ࡼࡧᅗ 5.9ODV࠾ࡼࡧBTV Type Cࢆタ⨨ࡋࡓ㝿ࡢࢹࣇ࣮ࣗࢨෆ㒊ὶࢀሙ
ࢆἜ⭷ἲࡼࡾྍどࡋࡓI 0.24, 0.18ࡢ⤖ᯝࢆ♧ࡍ㸬࡞࠾㸪ᅗ୰ࡢ㯮Ⰽࡢ◚⥺ࡣ㏫ὶ㡿ᇦ
㡰ὶ㡿ᇦࡢቃ⏺ࢆ♧ࡋ࡚࠾ࡾ㸪㉥▮༳ࡣ࿘᪉ྥࡢᚠ⎔ὶࡢ⤒㊰ࢆ♧ࡋ࡚࠸ࡿ㸬ࡲࡓ㸪 ᅗ 5.9୰ࡢࢹࣇ࣮ࣗࢨෆ⩚᰿⩼㠃ୖࡢ㉥⥺ࡣࢸ࣮ࣃ㒊ࡢቃ⏺ࢆ♧ࡋ࡚࠸ࡿ㸬
ᅗ 5.8 ODV I 0.24
ᅗ 5.7 ㏻㊰ᖜࡀᅽ⦰ᶵෆ㒊ࡢᅽຊሙ࠼ࡿᙳ㡪
(ii) B4= 26.14 mm (i) B4= 19.55 mm
I= 0.24 I= 0.17
I= 0.24 I= 0.17
A
100 115
Total Pressure kPa
B Hub
L.E.
Hub L.E.
Hub L.E.
Hub L.E.
ࡢቃ⏺⥺ࡀᏑᅾࡍࡿࡇࡀࢃࡿ㸬ࡑࢀక࠸⩚᰿㌴㏆ഐ࡛ࡣ㸪㉥▮༳࡛♧ࡍࡼ࠺㸪㞄 ᥋⩼ྥ࠺ᚠ⎔ὶࡀᙧᡂࡉࢀ࡚࠸ࡿࡇࡀࢃࡿ㸬ὶ㔞ࡀపୗࡋ㸪I 0.18࡞ࡿ㸪ࡇ ࡢ㏫ὶ㡿ᇦࡣࢹࣇ࣮ࣗࢨὶ㊰ෆࡲ࡛ᣑࡋ࡚࠸ࡿ㸬ࡑࡢ⤖ᯝ㸪㉥▮༳࡛♧ࡍࡼ࠺࡞ࢹ
ࣇ࣮ࣗࢨ๓⦕㒊ࢆᅇࡾ㎸ࡴὶࢀࡀᙧᡂࡉࢀ࡚࠸ࡿ㸬ࡇࡢ㏫ὶ㡿ᇦࡢᣑࡣᅽ⦰ᶵᛶ⬟ࡢప
ୗࡢせᅉ࡛࠶ࡿ⪃࠼ࡽࢀࡿ㸬
୍᪉㸪ෆ⩚᰿ࡢ๓⦕ࢸ࣮ࣃ㒊ࢆタࡅࡿ㸪ᅗ 5.9 ♧ࡍࡼ࠺㸪ࢸ࣮ࣃ㒊ࢆ㈏㏻ࡍ
ࡿὶࢀࡀ⏕ࡌࡿࡇࡼࡾ㸪㏫ὶ㡰ὶࡢቃ⏺⥺ࡀODVẚࡼࡾࢹࣇ࣮ࣗࢨὶ㊰ࡢෆ 㒊ᙧᡂࡉࢀ࡚࠾ࡾ㸪㏫ὶ㡿ᇦࡀᣑࡋ࡚࠸ࡿࡇࡀࢃࡿ㸬ࡋࡋ㸪ὶ㔞ࡼࡿᙳ㡪ࡣ
࠶ࡲࡾ☜ㄆࡉࢀ࡞ࡗࡓ㸬ࡇࡢ㏫ὶ㡿ᇦࡢᣑࡼࡾ㸪I 0.24ࡽ0.18ࡅ࡚ᅽ⦰ᶵᛶ
⬟ࡀపୗࡋࡓ⪃࠼ࡽࢀࡿ㸬୍᪉㸪పὶ㔞ഃ࡛ࡣ㸪㏫ὶ㡿ᇦࡢᣑࡀ☜ㄆࡉࢀ࡞࠸ࡇ
ࡽ㸪ODVẚ࡚ྑୖࡀࡾᏳᐃ㡿ᇦࡀ⦰ᑠࡉࢀࡿせᅉ࡞ࡗࡓ⪃࠼ࡽࢀࡿ㸬
୧ഃࢸ࣮ࣃຍᕤࢆࡋࡓ㝿ࡣ㸪ࢩࣗࣛ࢘ࢻഃ࡛㏫ὶ㡿ᇦࡀᣑࡋ࡚ࡋࡲ࠺ࡇࡽ㸪 ࢩࣗࣛ࢘ࢻഃࡢࢸ࣮ࣃ㒊ࡣⓎ⏕㦁㡢ࡢᢚไࡣຠᯝࡀ࠶ࡿࡀ㸪ᛶ⬟ࡢపୗࡢせᅉ࡞ࡗ࡚
ᅗᅗ 5.8 ࡃࡉࡧᙧෆ⩚᰿タ⨨ࡢࢹࣇ࣮ࣗࢨෆ㒊ὶࢀሙ (i) I= 0.24
(ii) I= 0.18
Shroud
Shroud
ࣈഃࢸ࣮ࣃᙧෆ⩚᰿㸦HTV㸧࠾ࡼࡧࢩࣗࣛ࢘ࢻഃࢸ࣮ࣃᙧෆ⩚᰿㸦STV㸧ࢆ〇సࡋ㸪ᛶ
⬟࠾ࡼࡧⓎ⏕㦁㡢㸪ෆ㒊ὶࢀሙࡘ࠸࡚ㄪᰝࢆ⾜ࡗࡓ㸬
5.1.4 ࣁࣁࣈഃ࠾ࡼࡧࢩࣗࣛ࢘ࢻഃࢸ࣮ࣃᙧෆ⩚᰿ࡢຠᯝ
ᅗ 5.10 ࠾ࡼࡧᅗ 5.11 ࣁࣈഃ࠾ࡼࡧࢩࣗࣛ࢘ࢻഃࢸ࣮ࣃᙧෆ⩚᰿タ⨨ࡢᛶ⬟࠾ࡼ
ࡧⓎ⏕㦁㡢ࡘ࠸࡚ㄪᰝࡋࡓ⤖ᯝࢆ♧ࡍ㸬࡞࠾㸪ࣁࣈഃ࠾ࡼࡧࢩࣗࣛ࢘ࢻഃࢸ࣮ࣃᙧෆ
⩚᰿ࡢ๓⦕㧗ࡉBT 0.8B4ࡋࡓ㸬ࡲࡓ㸪ᅗ 5.12࠾ࡼࡧᅗ 5.13ᛶ⬟࠾ࡼࡧⓎ⏕㦁㡢ᑐ ࡋ࡚ࡢෆ⩚᰿๓⦕㧗ࡉBTࡢᙳ㡪ࡘ࠸࡚♧ࡍ㸬
ᅗ 5.10♧ࡍࡼ࠺㸪STVࢆタ⨨ࡍࡿ㸪ODVẚ㸪I 0.24ࡽ0.18ࡅ࡚㸪ᛶ
⬟ࡢపୗࡀㄆࡵࡽࢀࡿ㸬ࡇࢀࡣ㸪BTV タ⨨ྠࡌഴྥ࡛࠶ࡿ㸬ࡲࡓ㸪ྑୖࡀࡾᏳᐃ㡿 ᇦࢆ⦰ᑠࡍࡿࡇࡀ࡛ࡁ࡞ࡗࡓ㸬୍᪉㸪HTV ࢆタ⨨ࡍࡿ㸪㧗ὶ㔞ᇦ࠾࠸࡚㧗࠸ᛶ⬟
ࢆ⥔ᣢࡋࡓࡲࡲ㸪పὶ㔞࠾࠸࡚ྑୖࡀࡾᏳᐃ㡿ᇦࢆ⦰ᑠࡍࡿࡇࡀ࡛ࡁࡓ㸬୍᪉㸪Ⓨ
⏕㦁㡢ࡣHTV࠾ࡼࡧSTVࡢࡕࡽࢆタ⨨ࡋ࡚ࡶ㸪I 0.24࠾࠸࡚㸪⣙3 dBࡢ㦁㡢ࣞ࣋ࣝ
I 0.18࠾࠸࡚ࡣ㸪STV
ᅗ 5.9 ୧ഃࢸ࣮ࣃᙧෆ⩚᰿タ⨨ࡢෆ㒊ὶࢀሙ
(i) I= 0.24
(ii) I= 0.18
Shroud
Shroud
㡢ࡣపῶࡍࡿഴྥࢆ♧ࡍࡀ㸪HTVࢆタ⨨ࡋࡓሙྜࡣI 0.24ẚ࡚ቑࡍࡿഴྥࢆ♧ࡋ ࡓ㸬ࡇࡢࡇࡽ㸪పὶ㔞࠾࠸࡚ࡣ㸪Ⓨ⏕㦁㡢ࡢせ࡞Ⓨ⏕㒊ࡣࢩࣗࣛ࢘ࢻഃᏑᅾ ࡍࡿ᥎ ࡉࢀࡿ㸬ࡋࡋ㸪ࡕࡽࡢሙྜ࠾࠸࡚ࡶ㸪ࡍ࡚ࡢὶ㔞ᇦ࠾࠸࡚ODVẚ
࡚Ⓨ⏕㦁㡢ࡢቑࢆᢚไྍ⬟࡛࠶ࡗࡓ㸬
ᅗᅗ 5.11 ࣁࣈഃ࠾ࡼࡧࢩࣗࣛ࢘ࢻഃࢸ࣮ࣃᙧෆ⩚᰿ࡀⓎ⏕㦁㡢࠼ࡿᙳ㡪
0.1 0.2 0.3
100
Flow Coefficient I 110
120 130
Sound Pressure Level dB
ODV B4= 26.14 mm
VL B4= 19.55 mm STV B4= 26.14 mm HTV B4= 26.14 mm 3 dB
Non-dimensional Flow Coefficient I*
0.50 0.75 1.00 1.25
Iopt
ᅗ 5.10 ࣁࣈഃ࠾ࡼࡧࢩࣗࣛ࢘ࢻഃࢸ࣮ࣃᙧෆ⩚᰿ࡀᛶ⬟࠼ࡿᙳ㡪
0.1 0.2 0.3
0.9 1.0 1.1 1.2 1.3
Flow Coefficient I
Pressure-rise Coefficient\
ODV B4= 26.14 mm
VL B4= 19.55 mm STV B4= 26.14 mm HTV B4= 26.14 mm
0.50 0.75 1.00 1.25
Non-dimensional Flow Coefficient I*
Iopt
タ⨨ࡍࡿI 0.24࠾࠸࡚ࡣࡁ࡞పୗࢆకࢃࡎ㧗࠸ᅽຊୖ᪼ࢆ⥔ᣢྍ⬟࡛࠶ࡗࡓ㸬ࡲࡓ㸪 I 0.18࠾࠸࡚ࡣ㸪ࡍ࡚ࡢ๓⦕㧗ࡉBT࠾࠸࡚ᛶ⬟ࡢᨵၿࡀぢࡽࢀࡓ㸬୍᪉㸪STV ࢆ タ⨨ࡍࡿ㸪ࡍ࡚ࡢ๓⦕㧗ࡉࡘ࠸࡚ࡢὶ㔞࠾࠸࡚ࡶᖜ࡞ᛶ⬟పୗࡀぢࡽࢀࡓ㸬 Ⓨ⏕㦁㡢ࡢቑࡢᢚไຠᯝࡘ࠸࡚ࡣᅗ 5.13 ♧ࡍࡼ࠺㸪HTV࠾ࡼࡧSTVࡢࡕࡽ
ࡢࢸ࣮ࣃᙧෆ⩚᰿ࢆ⏝࠸࡚ࡶ㸪๓⦕㧗ࡉBTࡢ⦰ᑠక࠸ຠᯝⓗⓎ⏕㦁㡢ࡢపῶຠᯝ ࡀᚓࡽࢀࡓ㸬≉㸪ࣁࣈഃࢸ࣮ࣃᙧෆ⩚᰿ࢆ⏝࠸ࡓሙྜࡣ㸪I 0.24࠾࠸࡚Ⓨ⏕㦁㡢 ࡢపῶຠᯝࡀ㢧ⴭ࡛࠶ࡗࡓ㸬ࡇࡢࡇࡽ㸪ࣁࣈഃࢸ࣮ࣃᙧෆ⩚᰿ࢆタ⨨ࡍࡿࡇࡼ
ᅗ
ᅗ 5.13 ࢸ࣮ࣃᙧෆ⩚᰿ࡢ๓⦕㧗ࡉࡀⓎ⏕㦁㡢࠼ࡿᙳ㡪
ODV 0.8 0.6 0.4 0.2
110 120
115
Leading-edge Width BT
Sound Pressure Level dB
0 I= 0.18 I= 0.24
STV B4= 26.14 mm , I= 0.24 HTV B4= 26.14 mm, I= 0.24
STV B4= 26.14 mm , I= 0.18 HTV B4= 26.14 mm , I= 0.18 ᅗ 5.12 ࢸ࣮ࣃᙧෆ⩚᰿ࡢ๓⦕㧗ࡉࡀᛶ⬟࠼ࡿᙳ㡪
1.10 1.15 1.20
Pressure-rise Coefficient \
ODV 0.8 0.6 0.4 0.2
Leading-edge Width BT 0
STV B4= 26.14 mm , I= 0.24 HTV B4= 26.14 mm, I= 0.24 I= 0.18
I= 0.24
STV B4= 26.14 mm , I= 0.18 HTV B4= 26.14 mm , I= 0.18
ࡗࡓ㸬ࡋࡓࡀࡗ࡚㸪๓⦕㧗ࡉBTࡣᛶ⬟㸪Ⓨ⏕㦁㡢ࡢᢚไຠᯝࡢⅬ࠾࠸࡚᭱㐺್ࡀᏑ ᅾࡍࡿࡇࡀࢃࡗࡓ㸬
ḟ㸪ࢩࣗࣛ࢘ࢻഃࢸ࣮ࣃᙧෆ⩚᰿㸦STV㸧࠾ࡼࡧࣁࣈഃࢸ࣮ࣃᙧෆ⩚᰿㸦HTV㸧タ
⨨ࡢࢹࣇ࣮ࣗࢨ⩼㛫ࢩࣗࣛ࢘ࢻቨ㠃ࡢὶࢀሙࢆἜ⭷ἲࡼࡾྍどࡋࡓ⤖ᯝࢆᅗ 5.14
࠾ࡼࡧᅗ 5.15♧ࡍ㸬STVࢆタ⨨ࡋࡓሙྜࡣ㸪 ᅗ 5.9♧ࡋࡓBTVࡢሙྜྠࡌࡼ࠺
㸪ࢸ࣮ࣃ㒊ࢆ㈏㏻ࡍࡿὶࢀࡀ⏕ࡌࡿ㸬ࡇࡢࡓࡵ㸪ὶ㔞ࡀI = 0.18ࡲ࡛పୗࡍࡿ㸪ࢩࣗࣛ
࢘ࢻഃࡁ࡞㏫ὶᇦࡀBTVྠᵝᙧᡂࡉࢀ㸪ᛶ⬟పୗࡢせᅉ࡛࠶ࡿ⪃࠼ࡽࢀࡿ㸬୍᪉㸪 HTVࢆタ⨨ࡋࡓሙྜࡣ㸪ᅗ 5.15♧ࡍࡼ࠺㸪I 0.24࡛ࡣ㸪ODVࡰྠᵝ࡞ഴྥࢆ
♧ࡋ࡚࠸ࡿࡢᑐࡋ࡚㸪I 0.18࠾࠸࡚ࡣ㸪ෆ⩚᰿๓⦕㒊ࡢ㏫ὶ㡿ᇦࡢᡂ㛗ࡀᢚไࡉࢀ
࡚࠸ࡿࡇࡀࢃࡿ㸬ࡇࡢࡇࡀ㸪HTV ࡀపὶ㔞ᇦ࠾࠸࡚ᛶ⬟ࡀᨵၿ࡛ࡁࡓせᅉ࡛࠶ࡿ
⪃࠼ࡽࢀࡿ㸬
ᅗ
ᅗ 5.14 ࢩࣗࣛ࢘ࢻഃࢸ࣮ࣃᙧෆ⩚᰿タ⨨ࡢࢹࣇ࣮ࣗࢨෆ㒊ὶࢀሙ
(ii)I=0.18 (i)I=0.24
Shroud
Shroud
5.2 ࢹ ࢹࣇ࣮ࣗࢨ๓⦕ ࡢᣲື
๓⠇ࡲ࡛㸪HTV ࢆ⏝࠸ࡿࡇࡼࡾ㧗࠸ᅽຊୖ᪼ࢆ⥔ᣢࡋࡓࡲࡲ㸪Ⓨ⏕㦁㡢ࢆᢚไࡍ
ࡿࡇࡀྍ⬟࡛࠶ࡿࡇࡀࢃࡗࡓ㸬ᮏ⠇࡛ࡣ㸪HTV ࢆ᥇⏝ࡋࡓ㝿ᛶ⬟ࡀᨵၿྍ⬟࡞せ ᅉࡘ࠸࡚ࡲࡵࡿ㸬
5.2.1 ࢹࣇ࣮ࣗࢨ๓⦕
ᅗ 5.1 ㏻㊰ᖜࡀᅽ⦰ᶵᛶ⬟࠼ࡿᙳ㡪♧ࡋࡓࡼ࠺ࠊ㏻㊰ᖜࢆᣑࡍࡿపὶ㔞
࠾࠸࡚ྑୖࡀࡾᏳᐃ㡿ᇦࡀᣑࡍࡿ㸬ࢹࣇ࣮ࣗࢨ㒊ࡢෆ㒊ὶࢀሙࢆ⌮ゎࡍࡿࡓࡵ㸪
4 26.14 mm
B ࠾ࡅࡿ⩚᰿㌴ฟཱྀ㒊ࡽࢹࣇ࣮ࣗࢨෆ⩚᰿ධཱྀࡅ࡚ࡢᖹᆒ༙ᚄ
㏿ᗘࡢࢫࣃࣥ᪉ྥศᕸࡘ࠸࡚⪃ᐹࡍࡿ㸬ᅗ 5.16ື㟼⩼㛫ࡢࢭ࣑࣮࣋ࣥࣞࢫ㒊ࡢ༙ᚄ᪉
ྥ㏿ᗘࡢࢫࣃࣥ᪉ྥศᕸࢆ♧ࡍ㸬࡞࠾㸪ୖ㒊ィ ⨨ࢆ༙ᚄẚ R ᑐࡍࡿ⩚᰿㌴ࡽࡢ
ᅗ 5.15 ࣁࣈഃࢸ࣮ࣃᙧෆ⩚᰿タ⨨ࡢࢹࣇ࣮ࣗࢨෆ㒊ὶࢀሙ
(ii)I=0.18 (i)I=0.24
Shroud
Shroud
㒊㏆࡙ࡃࡘࢀ࡚㸪ࢩࣗࣛ࢘ࢻഃࡢὶࢀࡀ㏫ὶ࡞ࡿ㸬ࡇࡢᙳ㡪ࡼࡾ㸪ෆ⩚᰿ධཱྀ
㒊ࡢࢩࣗࣛ࢘ࢻഃࡣᐃᖖⓗ ᗘࡀⓎ⏕ࡋ㸪✚ࡉࢀ࡚࠸ࡿ㸬
ᅗ 5.17ෆ⩚᰿ධཱྀ㒊ࡢ㈇ᅽ㠃ࢩࣗࣛ࢘ࢻഃᙧᡂࡉࢀࡿ ࢆἜ⭷ἲࡼࡾྍどࡋ
ࡓ⤖ᯝࢆ♧ࡍ㸬ඛ㏙ࡓࡼ࠺㸪ࢹࣇ࣮ࣗࢨෆ⩚᰿ධཱྀ㒊ࡢࢩࣗࣛ࢘ࢻഃ࠾࠸
࡚⩚᰿㌴ྤฟὶࡢ≉␗࡞ὶࢀᵓ㐀ࡢᙳ㡪ࡼࡾᐃᖖⓗ ᗘࡀ✚ࡉࢀࡿ㸬ࡇࡢࡓࡵ㸪ᅗ 5.17 ♧ࡍࡼ࠺ෆ⩚᰿ධཱྀ㒊 ࡀᙧᡂࡉࢀࡿ㸬௨ᚋ㸪ࡇࡢ ࢆࢹࣇ࣮ࣗࢨ๓⦕
ࡪࡇࡍࡿ㸬
ࢹࣇ࣮ࣗࢨ๓⦕ ࡣ㸪I 0.24࠾࠸࡚ࡣ㸪㏻㊰ᖜࡢ⣙ 40%⛬ᗘࡢࡁࡉ࡛࠶ࡗࡓࡀ㸪
(i) I= 0.24 (ii) I= 0.18
Leading-edge Vortex Hub
Shroud
Hub
Shroud
L.E. L.E.
Suction Surface Suction Surface
ᅗ
ᅗ 5.17 ࢹࣇ࣮ࣗࢨ๓⦕ ࡢⓎ⏕※ࡢྍど
ᅗ
ᅗ 5.16 ື㟼⩼㛫࠾ࡅࡿ༙ᚄ᪉ྥὶ㏿ࡢࢫࣃࣥ᪉ྥศᕸ
I=0.24 I=0.20
I=0.16 I=0.14
R=1.01 R=1.02 R=1.04 R=1.06 R=1.08 R=1.095 R=1.12 100
0 40 80 60
20
-200 2040 -200 2040 -200 2040 -200 2040 -200 2040 -200 2040 -200 2040
Span from Hub %
Averaged Radial Velocity m/s
I 0.18࠾࠸࡚ࡣ㏻㊰ᖜࡢ⣙60%⛬ᗘࡲ࡛ࣁࣈഃྥࡗ࡚ᡂ㛗ࡋ࡚࠸ࡿ㸬ࡇࡢࡇࡽ㸪 ࢹࣇ࣮ࣗࢨ๓⦕ ࡣ౪ヨᅽ⦰ᶵࡢపὶ㔞㐠㌿≧ែ࠾࠸࡚㸪ྑୖࡀࡾᏳᐃ㡿ᇦࢆᣑ
ࡋ㸪ᛶ⬟పୗࡢ୍せᅉ࡞ࡿ⪃࠼ࡽࢀࡿ㸬ࡑࡇ࡛㸪ḟ⠇࡛ࡣࢹࣇ࣮ࣗࢨ๓⦕ ࡀෆ㒊 ὶࢀሙ࠼ࡿᙳ㡪ࡘ࠸࡚㸪DESࢆ⏝࠸ࡓᩘ್ゎᯒࡼࡾㄪᰝࢆ⾜ࡗࡓ㸬
ḟ㸪ࣁࣈഃ࠾ࡼࡧࢩࣗࣛ࢘ࢻഃࢸ࣮ࣃຍᕤࢆࡋࡓࢸ࣮ࣃᙧෆ⩚᰿ࢆタ⨨ࡋࡓ㝿 ࡢࢹࣇ࣮ࣗࢨ๓⦕ ࢆἜ⭷ἲࡼࡾྍどࡋࡓ㸬ᅗ 5.18ࢩࣗࣛ࢘ࢻഃࢸ࣮ࣃᙧෆ⩚
᰿(STV)㸪ᅗ 5.19ࣁࣈഃࢸ࣮ࣃᙧෆ⩚᰿(HTV)タ⨨ࡢἜ⭷ἲࡼࡿࢹࣇ࣮ࣗࢨ๓⦕
ࡢྍど⤖ᯝࢆ♧ࡍ㸬
ᅗ 5.18♧ࡍࡼ࠺㸪STVࢆタ⨨ࡋࡓሙྜࡣ㸪ࢹࣇ࣮ࣗࢨ๓⦕ ⮬యࡣ☜ㄆ࡛ࡁ࡞
࠸㸬ࡋࡋ㸪ᅗ୰㉥▮༳࡛♧ࡍࡼ࠺࡞࣑ࢵࢻࢫࣃࣥࡽࢩࣗࣛ࢘ࢻྥ࠺ὶࢀࡣ☜ㄆ࡛
ࡁࡿ㸬ࡲࡓᅗ 5.14♧ࡋࡓࡼ࠺㸪ࢹࣇ࣮ࣗࢨ⩼㛫㏻㊰ࡢෆ⩚᰿ධཱྀ㒊㏆ഐࡢࢩࣗࣛ
࢘ࢻቨ㠃ࢸ࣮ࣃ㒊ࢆ㈏㏻ࡍࡿ㏫ὶ㡿ᇦࡀᙧᡂࡉࢀࡓ㸬ࡇࡢࡇࡽ㸪ࢹࣇ࣮ࣗࢨ๓⦕
⮬యࡣ☜ㄆ࡛ࡁ࡞࠸ࡶࡢࡢ㸪 ⮬యࡣᏑᅾࡋ࡚࠾ࡾ㸪㏫ὶࡢせᅉ࡞ࡗ࡚࠸ࡿࡇࡀ♧
၀ࡉࢀࡿ㸬
(i) I= 0.24 (ii) I= 0.18
Hub
Shroud
Hub
Shroud
L.E. L.E.
Suction Surface Suction Surface
Leading-edge Vortex
ᅗᅗ 5.19 ࣁࣈഃࢸ࣮ࣃᙧෆ⩚᰿タ⨨ࡢෆ⩚᰿๓⦕ࡢὶࢀሙ
(i) I= 0.24 (ii) I= 0.18
Hub
Shroud
Hub
Shroud
L.E. L.E.
Suction Surface Suction Surface
ᅗ 5.18 ࢩࣗࣛ࢘ࢻഃࢸ࣮ࣃᙧෆ⩚᰿タ⨨ࡢෆ⩚᰿๓⦕ࡢὶࢀሙ
๓⦕ ࡀᏑᅾࡍࡿ㸬ࡇࡢ ࡣODVྠ⛬ᗘ࡛࠶ࡾ㸪㏻㊰ᖜࡢ⣙40%⛬ᗘ࡛࠶ࡿ㸬ࡋࡋ㸪 ODV࡛ࡣᅗ 5.17♧ࡋࡓ㏻ࡾὶ㔞ࡢపୗక࠸๓⦕ ࡣࣁࣈഃࡁࡃᡂ㛗ࡋࡓࡀ㸪HTV タ⨨ࡣ㸪ࡇࡢ๓⦕ ࡢᡂ㛗ࡣ☜ㄆ࡛ࡁ࡞ࡗࡓ㸬ࡇࡢࡇࡽ㸪HTV ࢆタ⨨ࡋࡓሙྜ
ࡣపὶ㔞ᇦ࠾࠸࡚ࡇࡢࢹࣇ࣮ࣗࢨ๓⦕ ࡢᡂ㛗ࢆᢚไࡍࡿࡇࡼࡗ࡚ODVẚ
࡚㧗࠸ᅽຊୖ᪼ࡀᚓࡽࢀࡓ⪃࠼ࡽࢀࡿ㸬
5.2.2 ࢹࢹࣇ࣮ࣗࢨ๓⦕ ࡢ㠀ᐃᖖᣲື
๓⠇ࡲ࡛㸪ࢹࣇ࣮ࣗࢨ๓⦕ ࡀపὶ㔞࠾࠸࡚ࡁࡃᡂ㛗ࡍࡿࡇࡼࡗ࡚ࢹࣇ
࣮ࣗࢨᦆኻࡢせᅉ࡞ࡗ࡚࠸ࡿࡇࡀ♧၀ࡉࢀࡓ㸬ࡑࡇ࡛㸪ࢹࣇ࣮ࣗࢨ๓⦕ ࡢᣲືࢆ
᫂ࡽࡍࡿࡓࡵ㸪ODVࢹࣇ࣮ࣗࢨ๓⦕ ࡢᡂ㛗ࢆᢚไྍ⬟࡛࠶ࡗࡓHTVࢆᑐ㇟
ࡋ࡚DESࡼࡿᩘ್ゎᯒࢆᐇࡋࡓ㸬
ᅗ 5.20 ࠾ࡼࡧᅗ 5.21Qᐃ⩏ࡼࡾ ࢥࢆᢳฟࡋ㸪↓ḟඖ࣊ࣜࢩࢸࡼࡾ╔Ⰽࡋ ࡓࢹࣇ࣮ࣗࢨ๓⦕ ࢆ♧ࡍ㸬ᅗ 5.20࠾ࡼࡧᅗ 5.21ࡣࡑࢀࡒࢀI 0.24࠾ࡼࡧ0.14ࡢ⤖ᯝ
࡛࠶ࡿ㸬ᅗ 5.20 ♧ࡍࡼ࠺I 0.24࠾࠸࡚ࢹࣇ࣮ࣗࢨ๓⦕ ࡣෆ⩚᰿๓⦕㒊ࡢ㈇
ᅽ㠃ࢩࣗࣛ࢘ࢻഃࡽ㞄᥋⩼ྥࡗ࡚ᡂ㛗ࡋ࡚࠸ࡿ㸬ࡲࡓ㸪ᅗ 5.21♧ࡍࡼ࠺㸪ὶ㔞 ࡀపୗࡍࡿ㸪ᐇ㦂ࡢ⤖ᯝྠᵝ㸪๓⦕ ࡣࡁࡃᡂ㛗ࡋ࡚࠸ࡿࡇࡀ☜ㄆ࡛ࡁࡿ㸬ࡇࡢ ๓ ⦕ ࡣI 0 . 1 ࠾ ࠸ ࡚ ࡣ 㸪 ㏻ ㊰ ᖜ ࡢ ࡰ 80%⛬ ᗘ ࡲ ࡛ ᡂ 㛗 ࡋ ࡚ ࠸ ࡿ ࡓ
ᅗ 5.20 ࢹࣇ࣮ࣗࢨ๓⦕ (ODV㸪 II = 0.24) I m p e l l e r
D i f f u s e r
LP
RP I= 0.14
LEV
ᅗᅗ 5.22 ࢹࣇ࣮ࣗࢨ㛫ࡢ㏿ᗘኚື (ODV㸪 II = 0.24 ࠾ࡼࡧ0.14)
0 5 10
0.20
0.10
0 Non-dimensional Radial Velocityv/vt
LP RP
Non-dimensional time t/Tbp (=t*) 0.20
0.10
0
I= 0.24
I= 0.14 LP RP
ᅗᅗ 5.21 ࢹࣇ࣮ࣗࢨ๓⦕ (ODV㸪 II = 0.14) Impeller
Diffuser
LP
RP I= 0.14
LEV
ࡵ㸪ࢹࣇ࣮ࣗࢨ㒊ࡢὶࢆ㜼ᐖࡋ㸪ࢹࣇ࣮ࣗࢨ㒊ࡢᦆኻࡢ୍せᅉ࡞ࡗ࡚࠸ࡿ㸬ࡇࡢ ࡇࡽ㸪ࢹࣇ࣮ࣗࢨ๓⦕ ࡢᡂ㛗ࢆᢚไࡍࡿࡇࡣ㸪ᅽ⦰ᶵࡢࢹࣇ࣮ࣗࢨ㒊ࡢᛶ⬟
ࡢᨵၿࡁࡃᐤࡍࡿ⪃࠼ࡽࢀࡿ㸬
ᅗ 5.22 ODV タ⨨ࡢࢹࣇ࣮ࣗࢨ⩼㛫ࡢ㏿ᗘኚືࢆ♧ࡍ㸬࡞࠾㸪ᅗ୰ࡢ LP ࠾ࡼࡧ
RPࡣ㸪ᅗ 5.20♧ࡍࢹࣇ࣮ࣗࢨᕥྑ⩼㛫࡛࠶ࡾ㸪ୖୗᅗࡢὶ㔞ࡣࡑࢀࡒࢀ㸪I 0.24࠾ ᅗᅗ 5.23 ࢹࣇ࣮ࣗࢨ๓⦕ ࡢ㛫ⓗᣲື (ODV㸪 II = 0.24)
LP
RP Diffuser
LEV
LP
RP
RP
LP
RP Diffuser
LEV
LP
Diffuser
LEV Diffuser
LEV
t*=2.5 t*=5.0
t*=6.0 t*=7.2
᰿㌴ࡀ୍⩼ศ⛣ືࡍࡿࡢ᭷ࡍࡿ㛫ࡼࡾ↓ḟඖࢆࡋࡓ㸬ࡲࡓ㸪ᅗ 5.22ࡢࡑࢀࡒࢀ
ࡢὶ㔞ಀᩘ࠾ࡅࡿ㏿ᗘኚືࡢᴟ್ࢆ♧ࡋࡓ้ᑐᛂࡋࡓࢹࣇ࣮ࣗࢨ๓⦕ ࡢᣲື࠾
ࡼࡧࡑࡢ㝿ࡢࢹࣇ࣮ࣗࢨෆ⩚᰿㈇ᅽ㠃ୖࡢ㝈⏺ὶ⥺ࡢㄪᰝࢆ⾜ࡗࡓ㸬ࡑࢀࡒࢀᅗ 5.23㸪 ᅗ 5.24㸪ᅗ 5.25࠾ࡼࡧᅗ 5.26♧ࡍ㸬࡞࠾㸪ᅗ 5.24㸪ᅗ 5.26࠾࠸࡚ࡢ㟷Ⰽࡢ▮༳ࡣ㸪 ࢹࣇ࣮ࣗࢨ๓⦕ ࡼࡾ㸪ὶ㏫ὶࡢቃ⏺࡛࠶ࡿ㸬
I 0.24࡛ࡣ㸪ᅗ 5.20 ♧ࡋࡓࡼ࠺ࢹࣇ࣮ࣗࢨ๓⦕ ࡣࢹࣇ࣮ࣗࢨ㒊ධཱྀࢩࣗࣛ
࢘ࢻഃ㒊ศᏑᅾࡋ࡚࠸ࡿࡶࡢࡢ㸪ࢹࣇ࣮ࣗࢨࡢᕥྑ⩼㛫ࡢ㏿ᗘኚືࡣࡰྠ࡛ࣞ࣋ࣝ
࠶ࡾࡁ࡞ᕪࡣぢࡽࢀ࡞࠸㸬ࡇࡢࡁ㸪ᅗ 5.23 ࠾ࡼࡧᅗ 5.24 ࡽ㸪ࢹࣇ࣮ࣗࢨ๓⦕
ࡣᏑᅾࡋ࡚࠸ࡿࡶࡢࡢࡑࡢࡁࡉࡁ࡞ኚࡀ࡞࠸㸬ࡇࡢࡇࡽ㸪ࢹࣇ࣮ࣗࢨ๓⦕
ࡣI 0.24࡛ࡣ㸪Ꮡᅾࡣࡋ࡚࠸ࡿࡶࡢࡢࡁ࡞ኚືࡀ࡞ࡃᏳᐃࡋ࡚࠾ࡾ㸪ෆ㒊ὶࢀሙ
ࡁ࡞ᙳ㡪ࡣཬࡰࡋ࡚࠸࡞࠸⪃࠼ࡽࢀࡿ㸬
୍᪉࡛㸪I 0.14࡛ࡣ㸪ᕥྑ⩼㛫࠾࠸࡚ࡁࡃ␗࡞ࡗ࡚࠸ࡿ㸬≉㸪LP ഃ⩼㛫ࡢὶ㏿
ࡀRP ഃ⩼㛫ࡢὶ㏿ẚ࡚ࡁࡃపୗࡋ࡚࠸ࡿࡇࡽ㸪LP ഃࡢ⩼㛫ࡣኻ㏿㝗ࡗ࡚࠸
ࡿ⪃࠼ࡽࢀࡿ㸬ࡇࡢࡁ㸪ᅗ 5.25㸪ᅗ 5.26 ୰ࡢt* 3.4࠾࠸࡚ࢹࣇ࣮ࣗࢨ๓⦕
I 0.24ẚࡁࡃᡂ㛗ࡋ࡚࠾ࡾ㸪ࡰࣁࣈഃࡲ࡛ᣑࡋ࡚࠸ࡿࡇࡀࢃࡿ㸬ࡇࡢࡇ
ࡽ㸪ࢹࣇ࣮ࣗࢨ๓⦕ ࡀᡂ㛗ࡍࡿࡇࡼࡾ㸪ࢹࣇ࣮ࣗࢨෆ⩚᰿ධཱྀࡢࢫࣃࣥ
ᅗᅗ 5.24 ࢹࣇ࣮ࣗࢨෆ⩚᰿㈇ᅽ㠃ୖࡢ㝈⏺ὶ⥺ࡢ㛫ኚ (ODV㸪 II = 0.14) t*=5.0
t*=6.0 t*=7.2
L.E.
Center of Vortex Shroud
Hub
Shroud
Hub t*=2.5
࡞ኻ㏿ࡢཎᅉ࡛࠶ࡿ㸬
ࡲࡓ㸪ᅗ 5.22୰ࡢI 0.14࡛ࡣ㸪㛫ࡢ⤒㐣ࡶ㸪LPഃ࠾ࡼࡧRPഃࡢ㏿ᗘኚືࣞ
࣋ࣝࡢᕪࡀᚎࠎ⦰ᑠࡋ࡚࠸ࡿ㸬ᅗ 5.25࠾ࡼࡧᅗ 5.26ࡽ㸪LPഃࡢ㏿ᗘࡀࡁࡃ࡞ࡿ
ࡘࢀ࡚㸪ࢹࣇ࣮ࣗࢨ๓⦕ ࡢࡁࡉࡀ⦰ᑠࡋ࡚࠸ࡿ㸬ࡇࡢࡇࡽ㸪ࡇࡢࢹࣇ࣮ࣗࢨ ๓⦕ ࡢ㛫ⓗ࡞ᣑ⦰ᑠ㐠ືࡀ㐲ᚰᅽ⦰ᶵ࠾ࡅࡿࢹࣇ࣮ࣗࢨ㒊Ⓨ⏕ࡍࡿኻ㏿ࡢึ
⏕ࡢ୍せᅉ࡛࠶ࡿ⪃࠼ࡿ㸬
ḟ㸪HTV ࢆタ⨨ࡋࡓ㝿ࡢࢹࣇ࣮ࣗࢨ⩼㛫ࡢ㏿ᗘኚືࢆᅗ 5.27 ♧ࡍ㸬ࡲࡓ㸪ODV ᅗᅗ 5.25 ࢹࣇ࣮ࢨ๓⦕ ࡢ㛫ᣲື (ODV㸪 II = 0.14)
LP
RP Diffuser
LEV
LP
RP
RP
LP
RP Diffuser
LEV
LP
Diffuser
LEV Diffuser
LEV
t*=3.4 t*=4.6
t*=6.1 t*=7.9
ࡧࡑࡢ㝿ࡢࢹࣇ࣮ࣗࢨෆ⩚᰿㈇ᅽ㠃ୖࡢ㝈⏺ὶ⥺ࢆࡑࢀࡒࢀᅗ 5.28㸪ᅗ 5.29㸪ᅗ 5.30㸪 ᅗ
ᅗ 5.27 ࢹࣇ࣮ࣗࢨෆ⩚᰿⩼㛫ࡢ㏿ᗘኚື (HTV㸪 II = 0.24 ࠾ࡼࡧ0.14) 0.20
0.10
0 0.20
0.10
0 0 5 10
I= 0.24
I= 0.16
RP
LP
RP
LP Non-dimensional Radial Velocityv/vt
Non-dimensional time t/Tbp (= t*)
ᅗ 5.26 ࢹࣇ࣮ࣗࢨෆ⩚᰿㈇ᅽ㠃ୖࡢ㝈⏺ὶ⥺ࡢ㛫ኚ (ODV㸪 II = 0.14) t*=4.6
t*=6.1 t*=7.9
L.E.
Center of Vortex Shroud
Hub
Shroud
Hub t*=3.4
ᅗ 5.27 ࡼࡾ㸪HTV ࢆタ⨨ࡋࡓሙྜ㸪I 0.24࠾࠸࡚ࡣODVࢆタ⨨ࡋࡓሙྜఝࡓഴ
ྥࢆ♧ࡋ㸪ᕥྑ⩼㛫ࡢ㏿ᗘኚືࡣࡼࡃ୍⮴ࡋ࡚࠸ࡿ㸬ࡲࡓ㸪ᅗ 5.28㸪ᅗ 5.29ࡽ㸪ࢹࣇ
࣮ࣗࢨ๓⦕ ࡀෆ⩚᰿㈇ᅽ㠃ࡢࢩࣗࣛ࢘ࢻഃᏑᅾࡍࡿࡇࡀ☜ㄆ࡛ࡁࡿ㸬I 0.24࡛ࡣ㸪 ࢹࣇ࣮ࣗࢨ๓⦕ ࡣ㛫ⓗᏳᐃࡋ࡚Ꮡᅾࡋ࡚࠾ࡾ㸪ࡁ࡞ኚࡣぢࡽࢀ࡞࠸㸬୍᪉㸪 I 0.14࠾࠸࡚ࡶ㸪ᕥྑ⩼㛫ࡢ㏿ᗘኚືࡣI 0.24ẚ࡚ኚࡣࡋ࡚࠸ࡿࡶࡢࡢ㸪㏿ᗘ ኚືࡁ࡞ᕪ␗ࡣ⌧ࢀ࡚࠸࡞࠸㸬ࡲࡓ㸪ࢹࣇ࣮ࣗࢨ๓⦕ ࡘ࠸࡚ࡶI 0.24ẚ㸪
ࡁࡃᣑࡣࡋ࡚࠸ࡿࡶࡢࡢ㸪㏻㊰ᖜࡢ⣙ 60%⛬ᗘࡢࡁࡉ␃ࡲࡗ࡚࠸ࡿ㸬ࡇࡢࡓࡵ㸪 I 0.14࠾࠸࡚ࡶࢹࣇ࣮ࣗࢨ⩼㛫ෆᒁᡤⓗ࡞ኻ㏿ࡣ☜ㄆ࡛ࡁ࡞࠸㸬
௨ୖࡢࡇࡽ㸪HTV ࢆタ⨨ࡍࡿࡇࡼࡾ㸪ὶ㔞ࡢపୗక࠺ࢹࣇ࣮ࣗࢨ๓⦕ ࡢ ᣑࢆᢚไࡍࡿࡶ㸪ࢹࣇ࣮ࣗࢨ㒊Ⓨ⏕ࡍࡿኻ㏿ࢆᅇ㑊࡛ࡁࡿ⪃࠼ࡽࢀࡿ㸬
LP
RP Diffuser
LEV
LP
RP
RP
LP
RP Diffuser
LEV
LP
Diffuser
LEV Diffuser
LEV
t*=2.0 t*=2.9
t*=3.8 t*=6.5
Impeller Impeller
Impeller Impeller
ᅗ
ᅗ 5.28 ࢹࣇ࣮ࣗࢨ๓⦕ ࡢ㛫ᣲື (HTV㸪 II = 0.24)
t*=4.6
t*=6.1 t*=7.9
L.E.
Center of Vortex Shroud
Hub
Shroud
Hub t*=3.4
ᅗ
ᅗ 5.29 ࢹࣇ࣮ࣗࢨෆ⩚᰿㈇ᅽ㠃ୖࡢ㝈⏺ὶ⥺ࡢ㛫ኚ (HTV㸪 II = 0.24)
LP
RP Diffuser
LEV
LP
RP
RP
LP
RP Diffuser
LEV
LP
Diffuser
LEV Diffuser
LEV
t*=2.8 t*=4.4
t*=5.4 t*=7.5
Impeller Impeller
Impeller Impeller
ᅗᅗ 5.30 ࢹࣇ࣮ࣗࢨ๓⦕ ࡢ㛫ᣲື (HTV㸪 II = 0.14)
t*=4.4
t*=5.4 t*=7.5
L.E.
Center of Vortex Shroud
Hub
Shroud
Hub t*=2.8
ᅗ
ᅗ 5.31 ࢹࣇ࣮ࢨෆ⩚᰿㈇ᅽ㠃ୖࡢ㝈⏺ὶ⥺ࡢ㛫ኚ (HTV㸪 II = 0.24)
➨
➨ 6 ❶ ື㟼⩼㛫㊥㞳࠾ࡼࡧタ⨨ゅࡀᛶ⬟࠾
ࡼࡧ㦁㡢࠼ࡿᙳ㡪
๓⠇࡛ࡣ㸪ࢹࣇ࣮ࣗࢨ㏻㊰ᖜࡀᛶ⬟࠾ࡼࡧ㦁㡢࠼ࡿᙳ㡪ࡘ࠸࡚ࡢ᳨ウࢆ⾜ࡗࡓ㸬 ᮏ⠇࡛ࡣ㸪⩚᰿㌴ฟཱྀෆ⩚᰿ධཱྀࡢ㝽㛫(ື㟼⩼㛫㊥㞳ࡪ㸪Impeller-Diffuser Radial Gap)࠾ࡼࡧタ⨨ゅࡢᙳ㡪ࡘ࠸࡚ㄪᰝࢆ⾜ࡗࡓ㸬ࡲࡓ㸪୕ḟඖࢸ࣮ࣃᙧෆ⩚᰿ࡢຠᯝ
ࡘ࠸࡚ࡢ᳨ウࡶ⾜ࡗࡓ㸬
⾲ 6.1 ᮏ❶࡛ㄪᰝࢆ⾜ࡗࡓࢹࣇ࣮ࣗࢨෆ⩚᰿ࡢ↓ḟඖື㟼⩼㛫㊥㞳タ⨨ゅࢆ♧
ࡍ㸬
⾲ 6.1 ࢹࣇ࣮ࣗࢨෆ⩚᰿ࡢタ⨨⨨
Installed Position Impeller-diffuser Radial Gap Lid = D3/D2
Inlet Angle Edeg
Original
Position 1
Position 2
Position 3