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RE: [TCML] Tesla Turbine
Warren Rice (Prof. Emiritus, Dept. of Mechanical & Space Engineering, Arizona State Univ.) says "In general, it has been found that the efficiency of the rotor can be very high, at least equal to that achieved by conventional rotors. But it has proved very difficult to achieve efficient nozzles in the case of turbines. . . . With proper use of the analytical results, the rotor efficiency using laminar flow can be very high, even above 95%. However, in order to attain high rotor efficiency, the flowrate number must be made small which means high rotor efficiency is achieved at the expense of using a large number of disks and hence a physically large rotor. . . .
All things considered, it seems probable that _Tesla-type pumps_ of reasonable size, operating with common fluids, will not exceed an efficiency of 65% at best, with careful attention to volute/rotor matching."
Source: Rice, Warren, "Tesla Turbomachinery," Proc. IV International Nikola Tesla Symposium, Sept. 23-25, 1991; http://www.gyroscope.com/images/teslaturbine/TeslaTurboMachinery.pdf .
See also http://www.rexresearch.com/teslatur/turbine3.htm .
-----Original Message-----
From: tesla-bounces@xxxxxxxxxx On Behalf of gary350@xxxxxxxxxxxxx
Subject: [TCML] Tesla Turbine
I know a guy that wants to build a Tesla Turbine. He wants to know what is the efficiency of this engine? Is it worth building or is he wasting his time?
-----Original Message-----
>From: piranha <piranha@xxxxxxxxxx>
>Sent: Jun 29, 2009 5:25 PM
>To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
>Subject: Re: [TCML] The Hammertone Predikter
>
>Hi Jim,
>
>Scan Tesla had a large "array" of equations like that. That had to be
>solved for ten solutions. Antonio had to figure that one out though!! ;)
>He made it looks easy :) That is why EEs make the big bucks so they can
>retire at 45 :D
>
>
>Just an update too. I ran Microsim models and the delay is constant
>during a ring down. My simple model gave a 1.7833uS Prediktion and the
>actual was 1.858uS. So the real was 4.2% longer with ringdown. My simple
>equations are probably close enough for practical work. But as I
>thought, there really is a little time added for ringdown but not much
>to worry with.
>
>Terry
>
>BTW - All the calculations done by mankind throughout history with a
>slide rule can be done on a fast desktop PC in under a minute :D Knowing
>what to calculate and how to calculate it is the key ;) That takes far
>longer and no PC can do that... Here is Antonio's ScanTesla solution:
>
>=====================================================
>NOTES
>
>Antonio supplies the magic calculating engine for solving the nodes.
>I basically just add the input and output scanning stuff.
>
>DRSSTC simulator
>By Antonio Carlos M. de Queiroz acmq@xxxxxxxxxxx
>Version 1.0 - 6/6/2005
>
>This program simulates the structure:
>+v1- k12 +v3-
>+---C1--R1--+ +--R2--+--C3--+
>+| + | | + | + |
>vin i1 L1 L2 i2 C2 v2 R3
>-| - | | - | - |
>+-----------+ +------+------+
>*/
>
>/* Inverts [L] matrix */
>M=K12*sqrt(L1*L2);
>d=L1*L2-M*M;
>G11=L2/d;
>G22=L1/d;
>G12=-M/d;
>G21=G12;
>/* Assembles the state equations dx/dt=[A]*x+B*vin */
>A[1][1]=0; A[1][2]=0; A[1][3]=0; A[1][4]=1/C1; A[1][5]=0;
>A[2][1]=0; A[2][2]=-1/(R3*C2); A[2][3]=1/(R3*C2); A[2][4]=0; A[2][5]=-1/C2;
>A[3][1]=0; A[3][2]=1/(R3*C3); A[3][3]=-1/(R3*C3); A[3][4]=0; A[3][5]=0;
>A[4][1]=-G11; A[4][2]=G12; A[4][3]=0; A[4][4]=-G11*R1; A[4][5]=-G12*R2;
>A[5][1]=-G12; A[5][2]=G22; A[5][3]=0; A[5][4]=-G12*R1; A[5][5]=-G22*R2;
>B[1]=0; B[2]=0; B[3]=0; B[4]=G11; B[5]=G21;
>
>/* Generates MT=([I]-(dt/2)*[A])^(-1) */
>for (i=1; i<6; i++)
>for (j=1; j<6; j++)
>if (i==j) MT[i][j]=1-(T1_inc/2)*A[i][j];
>else MT[i][j]=-(T1_inc/2)*A[i][j];
>Invert(5,MT);
>/* Sets the initial state */
>==========================================================
>
>
>Jim Mora wrote:
>> Hi Terry, Et Al,
>>
>> Damn, that may seem trivial to you! I used to do phase angles with a slide
>> rule which was easier but three points max accurate. No one in class had a
>> TI geekdom calculator as I remember. When that very aged teacher died, a
>> whole lot of radio theory and experience went with him.
>>
>> When the dust settles, and you folks on the bleeding edge of the frontier of
>> modern Tesla coiling have jumped the hurdles, I have yet another project to
>> look forward too ;-)
>>
>> Thanks for all you folks do,
>>
>> Jim Mora
>>
>>
>
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