He passes wind continually; does he have to do wudu for something else that breaks wudu in order to perform naafil prayers?
Question

I suffer from continual wind. My question is : if I break my wudu in a manner other than my ongoing problem with wind after offering the obligatory prayer, do I have to do wudu again in order to offer naafil prayers such as qiyaam al-layl, etc? What intention should I have when doing wudu in this case?.
Praise be to Allah.The scholars differed concerning the wudu of one who suffers from urinary incontinence or passes wind continually. Does he have to do wudu for each obligatory prayer after the time for it begins, and then pray as much as he wants to of naafil prayers, or is it permissible for him to do wudu once and pray all the prayers with it, unless he breaks his wudu in a manner other than his ongoing incontinence? 
Abu Haneefah, al-Shaafa’i and Ahmad were of the view that he should do wudu for each prayer after the time for it begins. 
Maalik was of the view that it is permissible for the one who is suffering from incontinence to do wudu once and offer all his prayers with it, so long as his wudu is not broken by something other than that ongoing incontinence. 
The first view is more on the safe side and is the view of the majority. 
See the answer to question no. 22843 for more information. 
But if the person who suffers from incontinence breaks his wudu in a manner other than his ongoing problem, then he must repeat wudu, and it is not permissible for him to offer any prayer, obligatory or naafil, without doing wudu. Al-Bukhaari (6954) and Muslim (225) narrated from Abu Hurayrah (may Allah be pleased with him) that the Prophet (peace and blessings of Allah be upon him) said: “Allah does not accept the prayer of any one of you if he breaks his wudu until he does wudu.” 
The scholars are unanimously agreed that purification from minor impurity is a condition of prayer being valid, and it is not valid without it. See al-Majmoo’ by al-Nawawi (3/139); Majmoo’ al-Fatawa by Shaykh al-Islam Ibn Taymiyah (22/99). 
As for what your intention should be in this situation: 
You should intend to purify yourself in order to perform the prayer. 
It should be noted that it is not prescribed to utter the intention out loud, rather the intention should be formed in the heart. 
See question no. 13337 and 14234. 
And Allah knows best.