The invention concerns a burner comprising a premix designed to produce a flammable air-fuel mixture, said burner including a vortex generator, wherein are provided two complementary burner shells forming a passage body, having each a first half-cone burner shell section (1) and delimiting together a turbulence chamber, widening in the axis in the form of a cone, as well as tangential air intake slots in the axial longitudinal direction of the cone.

描述了一種用于產(chǎn)生可點(diǎn)燃的燃料-空氣混合物的預(yù)混燃燒器，該預(yù)混燃燒器具有渦流發(fā)生器日韩一区二区精品，該渦流發(fā)生器設(shè)置了至少兩個(gè)對穿流本體進(jìn)行補(bǔ)充的燃燒器殼免费无码在线观看黄色视频，所述燃燒器殼分別具有構(gòu)造為分錐形狀的第一燃燒器殼區(qū)段(1)并且共同限定著在軸向上按錐形方式擴(kuò)展的渦流室并且限制著所述沿軸向的錐體縱向伸展方向相互相切的進(jìn)氣縫隙。

In the paper four aspects have been studied:(1) tree and distributing, belonging to the correlative contents of the dendrology,(2) the macroscopical character in virtue of magnifier and entitative microscope observing the three sections (cross section, radial section and tangential section );(3) the microcosmic character, in virtue of light microscope observing slices.

本文從以下四個(gè)方面進(jìn)行了研究：(1)樹木及分布日韩小草在线，樹木學(xué)方面相關(guān)的內(nèi)容；(2)木材宏觀特征人人操人人摸超级碰，借助擴(kuò)大鏡和實(shí)體顯微鏡夜综合日韩中文字幕，在木材的三個(gè)標(biāo)準(zhǔn)切面，即橫切面小黄片久久不、徑切面和弦切面上進(jìn)行觀察久久最新视频；(3)木材微觀特征，借助光學(xué)顯微鏡觀察切片18禁黄网站禁片。

Each cell was mapped by the center point on the cell of transverse section with extended up and down for four pixel (nine-pixel lengths in total) and two pixels in width, and thereafter line convoluted dot map was obtained. Through Fourier transformation, the frequency distribution of power spectrum pattern from both horizontal and vertical direction was obtained, and the cell diameter in radius and tangential direction was known from the maximum value except 0 in the distribution.

把每個(gè)纖維細(xì)胞都用其中心的一個(gè)長9個(gè)像素點(diǎn)人人干在线视频、寬2個(gè)像素點(diǎn)的線段點(diǎn)圖表示，進(jìn)行傅立葉變換一级免费黄色视频一级免费黄色视频，其能量光譜圖在水平和垂直方向上的頻率分布日本群交视频，除零值以外的最大值，即為細(xì)胞徑向国产清纯白嫩大学生正在播放、弦向直徑黄片免费直接看的色色小视频。

The numerical results show that the secondary flow is enhanced in the cross section vertical to the mainstream for the revised burner, the gas tangential velocity component increases, and the rotational flow is intensified.

結(jié)果表明：改進(jìn)后的燃燒器明顯地增加了垂直于主流方向截面上的二次流，氣體的切向分速度增大操操网，旋流程度增強(qiáng)www.污污网站，能夠有效地改善煤氣和空氣的混合效果。

Suber The cork cells are seen as 14 polygons, show a honeycomblike arrangement in tangential section and resemble a brick wall in transverse and radial sections.

歐洲栓皮櫟軟木細(xì)胞為14面體一级毛片免费视频观看无码，弦切面細(xì)胞呈蜂窩狀排列国内私密经典盗摄AV，橫切面和徑切面呈磚墻狀排列；細(xì)胞壁上存在褶皺一级在线视频在线一级。

The results were as follows the airdried density ( moisture content of wood is 12%), the basic density and the ovendry density were 0.583 g·cm-3, 0.462 g·cm-3 and 0.507 g·cm-3 respectively, the airdried density was at the medium level in domestic wood species;the shrinkage coefficient of radial, tangential and volumetric were 0.099%, 0.183% and 0.296% respectively, the maximum swelling were 4.106%, 7.958% and 12.627% respectively;the ratio of tangential shrinkages to radial shrinkages was 1.5-1.9;the toughness was 52.12 kJ·m-2;the hardness of cross, radial and tangential section were 41.53 MPa, 31.41 MPa and 35.51 MPa respectively;the compressive strength parallel to grain was 44.50 MPa ;the modulus of elasticity in static bending and the bending strength were 12.63GPa and 127.31 MPa respectively;the shearing strength parallel to grain of radial and tangential were 8.76 MPa and 10.54 MPa respectively;the cleavage strength to grain of radial and tangential were 124.3 N·mm-1 and 138.6 N·mm-1 respectively.

結(jié)果表明大葉櫟木材的氣干密度（含水率為12％）日皮视频免费、基本密度和全干密度分別為0.583 g·cm-3、0.462 g·cm-3和0.507 g·cm-3黄色网站入口在线看，氣干密度屬于國產(chǎn)木材的中等級水平中文视频在线你懂的；徑向、弦向和體積干縮系數(shù)分別為0.099%高清無碼視頻免費在線觀看黃色、0.183%久久精品超碰、0.296%十八岁禁看网站，濕脹率依次為4.106%、7.958%和12.627%欧美国产综合，差異干縮為1.5-1.9国产精品免费-区二区三区，其尺寸穩(wěn)定性較好；沖擊韌性為52.12 kJ·m-2国产日韩欧美在线电影院日本黄色网站，端面一级特黄特色的免费大片观看、徑面和弦面硬度分別為41.53 MPa、31.41 MPa和35.51 MPawww.HEYZO.COM，順紋抗壓強(qiáng)度為44.50 MPa国产黄在线观看免费观看网站，抗彎彈性模量和抗彎強(qiáng)度分別為12.63 GPa和127.31 MPa，徑面和弦面順紋抗剪強(qiáng)度分別為8.76 MPa和10.54 MPa免费无遮挡网站，抗劈強(qiáng)度依次為124.3 N·mm-1和138.6 N·mm-1日韩成人教师在线播放视频。

The main factors affecting the surface roughness of wood are: species, method of machining, radial or tangential section and cell structure of wood surface.

針葉材粗糙度和粗糙感的分布范圍較闊葉材的窄，闊葉材的粗糙感主要受粗糙度的影響在线免费aa，針葉材的粗糙感主要來源于木材的年輪寬度特一级AAAAAA色。